diff --git a/Common/Common.csproj b/Common/Common.csproj
index 1c2f1adb5..62a509876 100644
--- a/Common/Common.csproj
+++ b/Common/Common.csproj
@@ -43,6 +43,17 @@
   <ItemGroup>
     <Compile Include="BackgroundBeep.cs" />
     <Compile Include="Enums.cs" />
+    <Compile Include="Forms\ListViewEx.cs" />
+    <Compile Include="Forms\ListViewExtensions.cs" />
+    <Compile Include="Forms\LviDateTimeColumnComparer.cs" />
+    <Compile Include="Forms\LviIntColumnComparer.cs" />
+    <Compile Include="Forms\LviNameSurnameColumnComparer.cs" />
+    <Compile Include="Forms\LviTextColumnComparer.cs" />
+    <Compile Include="Forms\MessageEventArgs.cs" />
+    <Compile Include="Forms\ModelessForm.cs" />
+    <Compile Include="Forms\ModelessForm.designer.cs">
+      <DependentUpon>ModelessForm.cs</DependentUpon>
+    </Compile>
     <Compile Include="StatisticalMetrics.cs" />
     <Compile Include="Iperl\OptoTelegramRaw.cs" />
     <Compile Include="SerializableDictionary.cs" />
@@ -63,7 +74,14 @@
     <Compile Include="UIControls\LviIntColumnComparer.cs" />
     <Compile Include="UIControls\LviTextColumnComparer.cs" />
   </ItemGroup>
-  <ItemGroup />
+  <ItemGroup>
+    <EmbeddedResource Include="Forms\ListViewEx.resx">
+      <DependentUpon>ListViewEx.cs</DependentUpon>
+    </EmbeddedResource>
+    <EmbeddedResource Include="Forms\ModelessForm.resx">
+      <DependentUpon>ModelessForm.cs</DependentUpon>
+    </EmbeddedResource>
+  </ItemGroup>
   <Import Project="$(MSBuildToolsPath)\Microsoft.CSharp.targets" />
   <!-- To modify your build process, add your task inside one of the targets below and uncomment it. 
        Other similar extension points exist, see Microsoft.Common.targets.
diff --git a/Common/Forms/ListViewEx.cs b/Common/Forms/ListViewEx.cs
new file mode 100644
index 000000000..8fd75da2c
--- /dev/null
+++ b/Common/Forms/ListViewEx.cs
@@ -0,0 +1,495 @@
+///
+/// Copyright (c) 2013-2022 Sensus Slovensko a.s.
+///
+using System;
+using System.Collections;
+using System.ComponentModel;
+using System.Drawing;
+using System.Data;
+using System.Windows.Forms;
+using System.Runtime.InteropServices;
+
+namespace Common.Forms
+{
+	/// <summary>
+	/// Event Handler for SubItem events
+	/// </summary>
+	public delegate void SubItemEventHandler(object sender, SubItemEventArgs e);
+	/// <summary>
+	/// Event Handler for SubItemEndEditing events
+	/// </summary>
+	public delegate void SubItemEndEditingEventHandler(object sender, SubItemEndEditingEventArgs e);
+
+
+	///	<summary>
+	///	Inherited ListView to allow in-place editing of subitems
+	///	</summary>
+	public class ListViewEx	: System.Windows.Forms.ListView
+	{
+		#region Interop structs, imports and constants
+		/// <summary>
+		/// MessageHeader for WM_NOTIFY
+		/// </summary>
+		private struct NMHDR 
+		{ 
+#pragma warning disable
+			public IntPtr hwndFrom; 
+			public Int32  idFrom; 
+			public Int32  code;
+#pragma warning restore
+        }
+
+
+		[DllImport("user32.dll")]
+		private	static extern IntPtr SendMessage(IntPtr hWnd, int msg,	IntPtr wPar, IntPtr	lPar);
+		[DllImport("user32.dll", CharSet=CharSet.Ansi)]
+		private	static extern IntPtr SendMessage(IntPtr	hWnd, int msg, int len,	ref	int	[] order);
+
+		// ListView messages
+		private const int LVM_FIRST					= 0x1000;
+		private const int LVM_GETCOLUMNORDERARRAY	= (LVM_FIRST + 59);
+
+		// Windows Messages that will abort editing
+		private	const int WM_HSCROLL = 0x114;
+		private	const int WM_VSCROLL = 0x115;
+		private const int WM_SIZE	 = 0x05;
+		private const int WM_NOTIFY	 = 0x4E;
+
+		private const int HDN_FIRST = -300;
+		private const int HDN_BEGINDRAG = (HDN_FIRST-10);
+		private const int HDN_ITEMCHANGINGA = (HDN_FIRST-0);
+		private const int HDN_ITEMCHANGINGW = (HDN_FIRST-20);
+		#endregion
+
+        public MySortOrder SortOrder = MySortOrder.None;
+        public int SortColumn = -1;
+
+		///	<summary>
+		///	Required designer variable.
+		///	</summary>
+		private	System.ComponentModel.Container	components = null;
+
+		public event SubItemEventHandler SubItemClicked;
+        public event SubItemEventHandler SubItemRightClicked;
+        public event SubItemEventHandler SubItemBeginEditing;
+		public event SubItemEndEditingEventHandler SubItemEndEditing;
+
+		public ListViewEx()
+		{
+			// This	call is	required by	the	Windows.Forms Form Designer.
+			InitializeComponent();
+
+			base.FullRowSelect = true;
+			base.View = View.Details;
+			base.AllowColumnReorder = true;
+		}
+
+		///	<summary>
+		///	Clean up any resources being used.
+		///	</summary>
+		protected override void	Dispose( bool disposing	)
+		{
+			if(	disposing )
+			{
+				if(	components != null )
+					components.Dispose();
+			}
+			base.Dispose( disposing	);
+		}
+
+		#region Component	Designer generated code
+		///	<summary>
+		///	Required method	for	Designer support - do not modify 
+		///	the	contents of	this method	with the code editor.
+		///	</summary>
+		private	void InitializeComponent()
+		{
+			components = new System.ComponentModel.Container();
+		}
+	  #endregion
+
+		private bool _doubleClickActivation = false;
+		/// <summary>
+		/// Is a double click required to start editing a cell?
+		/// </summary>
+		public bool DoubleClickActivation
+		{
+			get {  return _doubleClickActivation; }
+			set { _doubleClickActivation = value; }    
+		}
+
+
+		/// <summary>
+		/// Retrieve the order in which columns appear
+		/// </summary>
+		/// <returns>Current display order of column indices</returns>
+		public int[] GetColumnOrder()
+		{
+			IntPtr lPar	= Marshal.AllocHGlobal(Marshal.SizeOf(typeof(int)) * Columns.Count);
+
+			IntPtr res = SendMessage(Handle, LVM_GETCOLUMNORDERARRAY, new IntPtr(Columns.Count), lPar);
+			if (res.ToInt32() == 0)	// Something went wrong
+			{
+				Marshal.FreeHGlobal(lPar);
+				return null;
+			}
+
+			int	[] order = new int[Columns.Count];
+			Marshal.Copy(lPar, order, 0, Columns.Count);
+
+			Marshal.FreeHGlobal(lPar);
+
+			return order;
+		}
+
+
+		/// <summary>
+		/// Find ListViewItem and SubItem Index at position (x,y)
+		/// </summary>
+		/// <param name="x">relative to ListView</param>
+		/// <param name="y">relative to ListView</param>
+		/// <param name="item">Item at position (x,y)</param>
+		/// <returns>SubItem index</returns>
+		public int GetSubItemAt(int x, int y, out ListViewItem item)
+		{
+			item = this.GetItemAt(x, y);
+		
+			if (item !=	null)
+			{
+				int[] order = GetColumnOrder();
+				Rectangle lviBounds;
+				int	subItemX;
+
+				lviBounds =	item.GetBounds(ItemBoundsPortion.Entire);
+				subItemX = lviBounds.Left;
+				for (int i=0; i<order.Length; i++)
+				{
+					ColumnHeader h = this.Columns[order[i]];
+					if (x <	subItemX+h.Width)
+					{
+						return h.Index;
+					}
+					subItemX += h.Width;
+				}
+			}
+			
+			return -1;
+		}
+
+
+		/// <summary>
+		/// Get bounds for a SubItem
+		/// </summary>
+		/// <param name="Item">Target ListViewItem</param>
+		/// <param name="SubItem">Target SubItem index</param>
+		/// <returns>Bounds of SubItem (relative to ListView)</returns>
+		public Rectangle GetSubItemBounds(ListViewItem Item, int SubItem)
+		{
+			int[] order = GetColumnOrder();
+
+			Rectangle subItemRect = Rectangle.Empty;
+			if (SubItem >= order.Length)
+				throw new IndexOutOfRangeException("SubItem "+SubItem+" out of range");
+
+			if (Item == null)
+				throw new ArgumentNullException("Item");
+			
+			Rectangle lviBounds = Item.GetBounds(ItemBoundsPortion.Entire);
+			int	subItemX = lviBounds.Left;
+
+			ColumnHeader col;
+			int i;
+			for (i=0; i<order.Length; i++)
+			{
+				col = this.Columns[order[i]];
+				if (col.Index == SubItem)
+					break;
+				subItemX += col.Width;
+			} 
+			subItemRect	= new Rectangle(subItemX, lviBounds.Top, this.Columns[order[i]].Width, lviBounds.Height);
+			return subItemRect;
+		}
+
+
+		protected override void	WndProc(ref	Message	msg)
+		{
+			switch (msg.Msg)
+			{
+				// Look	for	WM_VSCROLL,WM_HSCROLL or WM_SIZE messages.
+				case WM_VSCROLL:
+				case WM_HSCROLL:
+				case WM_SIZE:
+					EndEditing(false);
+					break;
+				case WM_NOTIFY:
+					// Look for WM_NOTIFY of events that might also change the
+					// editor's position/size: Column reordering or resizing
+					NMHDR h = (NMHDR)Marshal.PtrToStructure(msg.LParam, typeof(NMHDR));
+					if (h.code == HDN_BEGINDRAG ||
+						h.code == HDN_ITEMCHANGINGA ||
+						h.code == HDN_ITEMCHANGINGW)
+						EndEditing(false);
+					break;
+			}
+
+			base.WndProc(ref msg);
+		}
+
+
+		#region Initialize editing depending of DoubleClickActivation property
+		protected override void OnMouseUp(System.Windows.Forms.MouseEventArgs e)
+		{
+			base.OnMouseUp(e);
+
+            MouseEventArgs me = (MouseEventArgs)e;
+            if (me.Button == MouseButtons.Right)
+            {
+                /// Right mouse button click function
+                RightClickFunctionSubitemAt(new Point(e.X, e.Y));
+            }
+            else
+            {
+                /// Normal function (=edit item)
+                if (DoubleClickActivation)
+                {
+                    return;
+                }
+
+                EditSubitemAt(new Point(e.X, e.Y));
+            }
+		}
+		
+		protected override void OnDoubleClick(EventArgs e)
+		{
+			base.OnDoubleClick (e);
+
+			if (!DoubleClickActivation)
+			{
+				return;
+			} 
+
+			Point pt = this.PointToClient(Cursor.Position);
+		
+			EditSubitemAt(pt);
+		}
+
+		///<summary>
+		/// Fire SubItemClicked
+		///</summary>
+		///<param name="p">Point of click/doubleclick</param>
+		private void EditSubitemAt(Point p)
+		{
+			ListViewItem item;
+			int idx = GetSubItemAt(p.X, p.Y, out item);
+			if (idx >= 0)
+			{
+				OnSubItemClicked(new SubItemEventArgs(item, idx));
+			}
+		}
+
+        ///<summary>
+        /// Fire SubItemRightClicked
+        ///</summary>
+        ///<param name="p">Point of click/doubleclick</param>
+        private void RightClickFunctionSubitemAt(Point p)
+        {
+            ListViewItem item;
+            int idx = GetSubItemAt(p.X, p.Y, out item);
+            if (idx >= 0)
+            {
+                OnSubItemRightClicked(new SubItemEventArgs(item, idx));
+            }
+        }
+
+		#endregion
+
+		#region In-place editing functions
+		// The control performing the actual editing
+		private Control _editingControl;
+		// The LVI being edited
+		private ListViewItem _editItem;
+		// The SubItem being edited
+		private int _editSubItem;
+
+		protected void OnSubItemBeginEditing(SubItemEventArgs e)
+		{
+			if (SubItemBeginEditing != null) SubItemBeginEditing(this, e);
+		}
+
+		protected void OnSubItemEndEditing(SubItemEndEditingEventArgs e)
+		{
+			if (SubItemEndEditing != null) SubItemEndEditing(this, e);
+		}
+
+		protected void OnSubItemClicked(SubItemEventArgs e)
+		{
+			if (SubItemClicked != null) SubItemClicked(this, e);
+		}
+
+        protected void OnSubItemRightClicked(SubItemEventArgs e)
+        {
+            if (SubItemRightClicked != null) SubItemRightClicked(this, e);
+        }
+
+
+		/// <summary>
+		/// Begin in-place editing of given cell
+		/// </summary>
+		/// <param name="c">Control used as cell editor</param>
+		/// <param name="Item">ListViewItem to edit</param>
+		/// <param name="SubItem">SubItem index to edit</param>
+		public void StartEditing(Control c, ListViewItem Item, int SubItem)
+		{
+			OnSubItemBeginEditing(new SubItemEventArgs(Item, SubItem));
+
+			Rectangle rcSubItem = GetSubItemBounds(Item, SubItem);
+
+			if (rcSubItem.X < 0)
+			{
+				// Left edge of SubItem not visible - adjust rectangle position and width
+				rcSubItem.Width += rcSubItem.X;
+				rcSubItem.X=0;
+			}
+			if (rcSubItem.X+rcSubItem.Width > this.Width)
+			{
+				// Right edge of SubItem not visible - adjust rectangle width
+				rcSubItem.Width = this.Width-rcSubItem.Left;
+			}
+
+			// Subitem bounds are relative to the location of the ListView!
+			rcSubItem.Offset(Left, Top);
+
+			// In case the editing control and the listview are on different parents,
+			// account for different origins
+			Point origin = new Point(0,0);
+			Point lvOrigin  = this.Parent.PointToScreen(origin);
+			Point ctlOrigin  = c.Parent.PointToScreen(origin);
+
+			rcSubItem.Offset(lvOrigin.X-ctlOrigin.X, lvOrigin.Y-ctlOrigin.Y);
+
+			// Position and show editor
+			c.Bounds = rcSubItem;
+			c.Text = Item.SubItems[SubItem].Text;
+			c.Visible = true;
+			c.BringToFront();
+			c.Focus();
+
+			_editingControl = c;
+			_editingControl.Leave += new EventHandler(_editControl_Leave);
+			_editingControl.KeyPress += new KeyPressEventHandler(_editControl_KeyPress);
+
+			_editItem = Item;
+			_editSubItem = SubItem;
+		}
+
+
+		private void _editControl_Leave(object sender, EventArgs e)
+		{
+			// cell editor losing focus
+			EndEditing(true);
+		}
+
+		private void _editControl_KeyPress(object sender, System.Windows.Forms.KeyPressEventArgs e)
+		{
+			switch (e.KeyChar)
+			{
+				case (char)(int)Keys.Escape:
+				{
+					EndEditing(false);
+					break;
+				}
+
+				case (char)(int)Keys.Enter:
+				{  
+					EndEditing(true);
+					break;
+				}
+			}
+		}
+
+		/// <summary>
+		/// Accept or discard current value of cell editor control
+		/// </summary>
+		/// <param name="AcceptChanges">Use the _editingControl's Text as new SubItem text or discard changes?</param>
+		public void EndEditing(bool AcceptChanges)
+		{
+			if (_editingControl == null)
+				return;
+
+			SubItemEndEditingEventArgs e = new SubItemEndEditingEventArgs(
+				_editItem,		// The item being edited
+				_editSubItem,	// The subitem index being edited
+				AcceptChanges ?
+					_editingControl.Text :	// Use editControl text if changes are accepted
+					_editItem.SubItems[_editSubItem].Text,	// or the original subitem's text, if changes are discarded
+				!AcceptChanges	// Cancel?
+			);
+
+			OnSubItemEndEditing(e);
+
+            if (_editSubItem >= 0 && _editSubItem < _editItem.SubItems.Count)
+            {
+                _editItem.SubItems[_editSubItem].Text = e.DisplayText;
+            }
+
+            if (_editingControl != null)
+            {
+                _editingControl.Leave -= new EventHandler(_editControl_Leave);
+                _editingControl.KeyPress -= new KeyPressEventHandler(_editControl_KeyPress);
+
+                _editingControl.Visible = false;
+            }
+
+			_editingControl = null;
+			_editItem = null;
+			_editSubItem = -1;
+		}
+		#endregion
+	}
+
+	
+	/// <summary>
+	/// Event Args for SubItemClicked event
+	/// </summary>
+	public class SubItemEventArgs : EventArgs
+	{
+        int subItem = -1;     /// Sub-item index
+        ListViewItem item = null;
+
+        public int SubItem { get { return subItem; } }
+        public ListViewItem Item { get { return item; } }
+
+        public SubItemEventArgs(ListViewItem item, int subItem)
+		{
+			this.subItem = subItem;
+			this.item = item;
+		}
+	}
+
+
+	/// <summary>
+	/// Event Args for SubItemEndEditingClicked event
+	/// </summary>
+	public class SubItemEndEditingEventArgs : SubItemEventArgs
+	{
+		string displayText = string.Empty;
+		bool cancel = true;
+
+		public SubItemEndEditingEventArgs(ListViewItem item, int subItem, string displayText, bool cancel) :
+			base(item, subItem)
+		{
+			this.displayText = displayText;
+			this.cancel = cancel;
+		}
+		public string DisplayText
+		{
+			get { return displayText; }
+			set { displayText = value; }
+		}
+		public bool Cancel
+		{
+			get { return cancel; }
+			set { cancel = value; }
+		}
+	}
+}
diff --git a/Common/Forms/ListViewEx.resx b/Common/Forms/ListViewEx.resx
new file mode 100644
index 000000000..7e323966c
--- /dev/null
+++ b/Common/Forms/ListViewEx.resx
@@ -0,0 +1,42 @@
+<?xml version="1.0" encoding="utf-8" ?>
+<root>
+	<xsd:schema id="root" xmlns="" xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:msdata="urn:schemas-microsoft-com:xml-msdata">
+		<xsd:element name="root" msdata:IsDataSet="true">
+			<xsd:complexType>
+				<xsd:choice maxOccurs="unbounded">
+					<xsd:element name="data">
+						<xsd:complexType>
+							<xsd:sequence>
+								<xsd:element name="value" type="xsd:string" minOccurs="0" msdata:Ordinal="1" />
+								<xsd:element name="comment" type="xsd:string" minOccurs="0" msdata:Ordinal="2" />
+							</xsd:sequence>
+							<xsd:attribute name="name" type="xsd:string" />
+							<xsd:attribute name="type" type="xsd:string" />
+							<xsd:attribute name="mimetype" type="xsd:string" />
+						</xsd:complexType>
+					</xsd:element>
+					<xsd:element name="resheader">
+						<xsd:complexType>
+							<xsd:sequence>
+								<xsd:element name="value" type="xsd:string" minOccurs="0" msdata:Ordinal="1" />
+							</xsd:sequence>
+							<xsd:attribute name="name" type="xsd:string" use="required" />
+						</xsd:complexType>
+					</xsd:element>
+				</xsd:choice>
+			</xsd:complexType>
+		</xsd:element>
+	</xsd:schema>
+	<resheader name="ResMimeType">
+		<value>text/microsoft-resx</value>
+	</resheader>
+	<resheader name="Version">
+		<value>1.0.0.0</value>
+	</resheader>
+	<resheader name="Reader">
+		<value>System.Resources.ResXResourceReader, System.Windows.Forms, Version=1.0.3102.0, Culture=neutral, PublicKeyToken=b77a5c561934e089</value>
+	</resheader>
+	<resheader name="Writer">
+		<value>System.Resources.ResXResourceWriter, System.Windows.Forms, Version=1.0.3102.0, Culture=neutral, PublicKeyToken=b77a5c561934e089</value>
+	</resheader>
+</root>
diff --git a/Common/Forms/ListViewExtensions.cs b/Common/Forms/ListViewExtensions.cs
new file mode 100644
index 000000000..e65f625e3
--- /dev/null
+++ b/Common/Forms/ListViewExtensions.cs
@@ -0,0 +1,109 @@
+///
+/// Copyright (c) 2019-2020 Sensus Slovensko a.s.
+///
+using System;
+using System.ComponentModel;
+using System.Runtime.InteropServices;
+using System.Windows.Forms;
+
+namespace Common.Forms
+{
+    [EditorBrowsable(EditorBrowsableState.Never)]
+    public static class ListViewExtensions
+    {
+        [StructLayout(LayoutKind.Sequential)]
+        public struct HDITEM
+        {
+            public Mask mask;
+            public int cxy;
+            [MarshalAs(UnmanagedType.LPTStr)]
+            public string pszText;
+            public IntPtr hbm;
+            public int cchTextMax;
+            public Format fmt;
+            public IntPtr lParam;
+            // _WIN32_IE >= 0x0300 
+            public int iImage;
+            public int iOrder;
+            // _WIN32_IE >= 0x0500
+            public uint type;
+            public IntPtr pvFilter;
+            // _WIN32_WINNT >= 0x0600
+            public uint state;
+
+            [Flags]
+            public enum Mask
+            {
+                Format = 0x4,       // HDI_FORMAT
+            };
+
+            [Flags]
+            public enum Format
+            {
+                SortDown = 0x200,   // HDF_SORTDOWN
+                SortUp = 0x400,     // HDF_SORTUP
+            };
+        };
+
+        public const int LVM_FIRST = 0x1000;
+        public const int LVM_GETHEADER = LVM_FIRST + 31;
+
+        public const int HDM_FIRST = 0x1200;
+        public const int HDM_GETITEM = HDM_FIRST + 11;
+        public const int HDM_SETITEM = HDM_FIRST + 12;
+
+        [DllImport("user32.dll", CharSet = CharSet.Auto, SetLastError = true)]
+        public static extern IntPtr SendMessage(IntPtr hWnd, UInt32 msg, IntPtr wParam, IntPtr lParam);
+
+        [DllImport("user32.dll", CharSet = CharSet.Auto, SetLastError = true)]
+        public static extern IntPtr SendMessage(IntPtr hWnd, UInt32 msg, IntPtr wParam, ref HDITEM lParam);
+
+        public static void SetSortIcon(this ListViewEx listViewControl, int columnIndex, MySortOrder order)
+        {
+            IntPtr columnHeader = SendMessage(listViewControl.Handle, LVM_GETHEADER, IntPtr.Zero, IntPtr.Zero);
+            for (int columnNumber = 0; columnNumber <= listViewControl.Columns.Count - 1; columnNumber++)
+            {
+                var columnPtr = new IntPtr(columnNumber);
+                var item = new HDITEM
+                {
+                    mask = HDITEM.Mask.Format
+                };
+
+                if (SendMessage(columnHeader, HDM_GETITEM, columnPtr, ref item) == IntPtr.Zero)
+                {
+                    throw new Win32Exception();
+                }
+
+                if (order != MySortOrder.None && columnNumber == columnIndex)
+                {
+                    switch (order)
+                    {
+                        case MySortOrder.Ascending:
+                        case MySortOrder.Ascending2:
+                            item.fmt &= ~HDITEM.Format.SortDown;
+                            item.fmt |= HDITEM.Format.SortUp;
+                            break;
+
+                        case MySortOrder.Descending:
+                        case MySortOrder.Descending2:
+                            item.fmt &= ~HDITEM.Format.SortUp;
+                            item.fmt |= HDITEM.Format.SortDown;
+                            break;
+
+                        default:
+                            break;
+                    }
+                }
+                else
+                {
+                    item.fmt &= ~HDITEM.Format.SortDown & ~HDITEM.Format.SortUp;
+                }
+
+                if (SendMessage(columnHeader, HDM_SETITEM, columnPtr, ref item) == IntPtr.Zero)
+                {
+                    throw new Win32Exception();
+                }
+            }
+        }
+    }
+}
diff --git a/Common/Forms/LviDateTimeColumnComparer.cs b/Common/Forms/LviDateTimeColumnComparer.cs
new file mode 100644
index 000000000..663cdb17a
--- /dev/null
+++ b/Common/Forms/LviDateTimeColumnComparer.cs
@@ -0,0 +1,46 @@
+///
+/// Copyright (c) 2019-2021 Sensus Slovensko a.s.
+///
+using System;
+using System.Collections;
+using System.Windows.Forms;
+
+namespace Common.Forms
+{
+    public class LviDateTimeColumnComparer : IComparer
+    {
+        int column;
+        MySortOrder order;
+
+        public LviDateTimeColumnComparer()
+        {
+            column = 0;
+            order = MySortOrder.Ascending;
+        }
+
+        public LviDateTimeColumnComparer(int column, MySortOrder order)
+        {
+            this.column = column;
+            this.order = order;
+        }
+
+        public int Compare(object x, object y)
+        {
+            DateTime valX = DateTime.Parse(((ListViewItem)x).SubItems[column].Text);
+            DateTime valY = DateTime.Parse(((ListViewItem)y).SubItems[column].Text);
+
+            if (valX == valY)
+            {
+                return 0;
+            }
+            else if ((order == MySortOrder.Descending || order == MySortOrder.Descending2))
+            {
+                return (valY > valX) ? 1 : -1;
+            }
+            else
+            {
+                return (valX > valY) ? 1 : -1;
+            }
+        }
+    }
+}
diff --git a/Common/Forms/LviIntColumnComparer.cs b/Common/Forms/LviIntColumnComparer.cs
new file mode 100644
index 000000000..147ef8af9
--- /dev/null
+++ b/Common/Forms/LviIntColumnComparer.cs
@@ -0,0 +1,34 @@
+///
+/// Copyright (c) 2019-2021 Sensus Slovensko a.s.
+///
+using System;
+using System.Collections;
+using System.Windows.Forms;
+
+namespace Common.Forms
+{
+    public class LviIntColumnComparer : IComparer
+    {
+        int column;
+        MySortOrder order;
+
+        public LviIntColumnComparer()
+        {
+            column = 0;
+            order = MySortOrder.Ascending;
+        }
+
+        public LviIntColumnComparer(int column, MySortOrder order)
+        {
+            this.column = column;
+            this.order = order;
+        }
+
+        public int Compare(object x, object y)
+        {
+            int valX = int.Parse(((ListViewItem)x).SubItems[column].Text);
+            int valY = int.Parse(((ListViewItem)y).SubItems[column].Text);
+            return (order == MySortOrder.Descending || order == MySortOrder.Descending2) ? (valY - valX) : (valX - valY);
+        }
+    }
+}
diff --git a/Common/Forms/LviNameSurnameColumnComparer.cs b/Common/Forms/LviNameSurnameColumnComparer.cs
new file mode 100644
index 000000000..837fdd2ff
--- /dev/null
+++ b/Common/Forms/LviNameSurnameColumnComparer.cs
@@ -0,0 +1,54 @@
+using System;
+using System.Collections;
+using System.Windows.Forms;
+
+namespace Common.Forms
+{
+    public class LviNameSurnameColumnComparer : IComparer
+    {
+        private int column;
+        MySortOrder order;
+
+        public LviNameSurnameColumnComparer()
+        {
+            column = 0;
+            order = MySortOrder.Ascending;
+        }
+
+        public LviNameSurnameColumnComparer(int column, MySortOrder order)
+        {
+            this.column = column;
+            this.order = order;
+        }
+
+        public int Compare(object x, object y)
+        {
+            string nameX = ((ListViewItem)x).SubItems[column].Text;
+            string nameY = ((ListViewItem)y).SubItems[column].Text;
+            string surnameX;
+            string surnameY;
+
+            switch (order)
+            {
+                case MySortOrder.Ascending:
+                    return String.Compare(nameX, nameY);
+
+                case MySortOrder.Descending:
+                    return String.Compare(nameY, nameX);
+
+                case MySortOrder.Ascending2:
+                    surnameX = (nameX.IndexOf(' ') > 0) ? nameX.Substring(nameX.IndexOf(' ') + 1) : nameX;
+                    surnameY = (nameX.IndexOf(' ') > 0) ? nameY.Substring(nameY.IndexOf(' ') + 1) : nameY;
+                    return String.Compare(surnameX, surnameY);
+
+                case MySortOrder.Descending2:
+                    surnameX = (nameX.IndexOf(' ') > 0) ? nameX.Substring(nameX.IndexOf(' ') + 1) : nameX;
+                    surnameY = (nameX.IndexOf(' ') > 0) ? nameY.Substring(nameY.IndexOf(' ') + 1) : nameY;
+                    return String.Compare(surnameY, surnameX);
+
+                default:
+                    return 0;
+            }
+        }
+    }
+}
diff --git a/Common/Forms/LviTextColumnComparer.cs b/Common/Forms/LviTextColumnComparer.cs
new file mode 100644
index 000000000..d98196514
--- /dev/null
+++ b/Common/Forms/LviTextColumnComparer.cs
@@ -0,0 +1,34 @@
+///
+/// Copyright (c) 2019-2021 Sensus Slovensko a.s.
+///
+using System;
+using System.Collections;
+using System.Windows.Forms;
+
+namespace Common.Forms
+{
+    public class LviTextColumnComparer : IComparer
+    {
+        private int column;
+        MySortOrder order;
+
+        public LviTextColumnComparer()
+        {
+            column = 0;
+            order = MySortOrder.Ascending;
+        }
+
+        public LviTextColumnComparer(int column, MySortOrder order)
+        {
+            this.column = column;
+            this.order = order;
+        }
+
+        public int Compare(object x, object y)
+        {
+            string txtX = ((ListViewItem)x).SubItems[column].Text;
+            string txtY = ((ListViewItem)y).SubItems[column].Text;
+            return (order == MySortOrder.Descending || order == MySortOrder.Descending2) ? String.Compare(txtY, txtX) : String.Compare(txtX, txtY);
+        }
+    }
+}
diff --git a/Common/Forms/MessageEventArgs.cs b/Common/Forms/MessageEventArgs.cs
new file mode 100644
index 000000000..443cfb420
--- /dev/null
+++ b/Common/Forms/MessageEventArgs.cs
@@ -0,0 +1,10 @@
+using System;
+
+namespace Common.Forms
+{
+    public class MessageEventArgs : EventArgs
+    {
+        public string Message;
+        public MessageEventArgs(string message) { Message = message; }
+    }
+}
diff --git a/Common/Forms/ModelessForm.Designer.cs b/Common/Forms/ModelessForm.Designer.cs
new file mode 100644
index 000000000..028eb8821
--- /dev/null
+++ b/Common/Forms/ModelessForm.Designer.cs
@@ -0,0 +1,63 @@
+namespace Common.Forms
+{
+    partial class ModelessForm
+    {
+        /// <summary>
+        /// Required designer variable.
+        /// </summary>
+        private System.ComponentModel.IContainer components = null;
+
+        /// <summary>
+        /// Clean up any resources being used.
+        /// </summary>
+        /// <param name="disposing">true if managed resources should be disposed; otherwise, false.</param>
+        protected override void Dispose(bool disposing)
+        {
+            if (disposing && (components != null))
+            {
+                components.Dispose();
+            }
+            base.Dispose(disposing);
+        }
+
+        #region Windows Form Designer generated code
+
+        /// <summary>
+        /// Required method for Designer support - do not modify
+        /// the contents of this method with the code editor.
+        /// </summary>
+        private void InitializeComponent()
+        {
+            this.label1 = new System.Windows.Forms.Label();
+            this.SuspendLayout();
+            // 
+            // label1
+            // 
+            this.label1.AutoSize = true;
+            this.label1.Location = new System.Drawing.Point(47, 29);
+            this.label1.Name = "label1";
+            this.label1.Size = new System.Drawing.Size(35, 13);
+            this.label1.TabIndex = 0;
+            this.label1.Text = "label1";
+            // 
+            // ModelessForm
+            // 
+            this.AutoScaleDimensions = new System.Drawing.SizeF(6F, 13F);
+            this.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font;
+            this.ClientSize = new System.Drawing.Size(191, 56);
+            this.Controls.Add(this.label1);
+            this.FormBorderStyle = System.Windows.Forms.FormBorderStyle.FixedDialog;
+            this.Name = "ModelessForm";
+            this.SizeGripStyle = System.Windows.Forms.SizeGripStyle.Hide;
+            this.StartPosition = System.Windows.Forms.FormStartPosition.CenterScreen;
+            this.Text = "ModelessForm";
+            this.ResumeLayout(false);
+            this.PerformLayout();
+
+        }
+
+        #endregion
+
+        private System.Windows.Forms.Label label1;
+    }
+}
\ No newline at end of file
diff --git a/Common/Forms/ModelessForm.cs b/Common/Forms/ModelessForm.cs
new file mode 100644
index 000000000..6af087f10
--- /dev/null
+++ b/Common/Forms/ModelessForm.cs
@@ -0,0 +1,76 @@
+using System;
+using System.Drawing;
+using System.Windows.Forms;
+
+namespace Common.Forms
+{
+    public partial class ModelessForm : Form
+    {
+        /// <summary>
+        /// Constructor to be used by the application
+        /// </summary>
+        /// <param name="title">Window title</param>
+        /// <param name="message">Displayed message</param>
+        public ModelessForm(string message, int backArgb = 0, int textArgb = 0, Font textFont = null, string title = null)
+        {
+            InitializeComponent();
+            ControlBox = false;
+
+            label1.Text = (message != null)  ? message : "Please wait";
+            BackColor   = (backArgb != 0)    ? Color.FromArgb(backArgb) : Color.LightGreen;
+            ForeColor   = (textArgb != 0)    ? Color.FromArgb(textArgb) : Color.Black;
+            label1.Font = (textFont != null) ? textFont : new Font("Arial", 14, FontStyle.Regular);
+            Text = (title != null) ? title : string.Empty;
+
+            float textWidth = Graphics.FromImage(new Bitmap(1, 1)).MeasureString(label1.Text, label1.Font).Width;
+            float textHeight = Graphics.FromImage(new Bitmap(1, 1)).MeasureString(label1.Text, label1.Font).Height;
+            Width = (int)textWidth + 120;		/// Form width calculated from the text width
+            Height += (int)textHeight;		    /// Form height calculated from the text height
+
+            UpdateMessageHandler += delegate(object sender, MessageEventArgs args)
+            {
+                if (InvokeRequired) { Invoke(new EventHandler<MessageEventArgs>(OnUpdateMessage), sender, args); }
+                else OnUpdateMessage(sender, args);
+            };
+
+            CloseFormHandler += delegate(object sender, EventArgs args)
+            {
+                if (InvokeRequired) { Invoke(new EventHandler<EventArgs>(OnCloseForm), sender, args); }
+                else OnCloseForm(sender, args);
+            };
+        }
+
+
+        /// <summary>
+        /// Called from the state machine when an operation forces a modeless dialog close.
+        /// </summary>
+        public void UpdateMessage(MessageEventArgs args)
+        {
+            if (UpdateMessageHandler == null) return;
+            try { UpdateMessageHandler(null, args); }
+            catch (Exception) { }
+        }
+        public event EventHandler<MessageEventArgs> UpdateMessageHandler;
+        void OnUpdateMessage(object sender, MessageEventArgs args)
+        {
+            if (args.Message != null) label1.Text = args.Message;
+        }
+
+
+        /// <summary>
+        /// Called from the state machine when an operation forces a modeless dialog close.
+        /// </summary>
+        public static void CloseForm()
+        {
+            if (CloseFormHandler == null) return;
+            try { CloseFormHandler(null, null); }
+            catch (Exception) { }
+        }
+        static public event EventHandler<EventArgs> CloseFormHandler;
+        void OnCloseForm(object sender, EventArgs args)
+        {
+            DialogResult = DialogResult.Cancel;
+            Close();
+        }
+    }
+}
diff --git a/Common/Forms/ModelessForm.resx b/Common/Forms/ModelessForm.resx
new file mode 100644
index 000000000..1af7de150
--- /dev/null
+++ b/Common/Forms/ModelessForm.resx
@@ -0,0 +1,120 @@
+<?xml version="1.0" encoding="utf-8"?>
+<root>
+  <!-- 
+    Microsoft ResX Schema 
+    
+    Version 2.0
+    
+    The primary goals of this format is to allow a simple XML format 
+    that is mostly human readable. The generation and parsing of the 
+    various data types are done through the TypeConverter classes 
+    associated with the data types.
+    
+    Example:
+    
+    ... ado.net/XML headers & schema ...
+    <resheader name="resmimetype">text/microsoft-resx</resheader>
+    <resheader name="version">2.0</resheader>
+    <resheader name="reader">System.Resources.ResXResourceReader, System.Windows.Forms, ...</resheader>
+    <resheader name="writer">System.Resources.ResXResourceWriter, System.Windows.Forms, ...</resheader>
+    <data name="Name1"><value>this is my long string</value><comment>this is a comment</comment></data>
+    <data name="Color1" type="System.Drawing.Color, System.Drawing">Blue</data>
+    <data name="Bitmap1" mimetype="application/x-microsoft.net.object.binary.base64">
+        <value>[base64 mime encoded serialized .NET Framework object]</value>
+    </data>
+    <data name="Icon1" type="System.Drawing.Icon, System.Drawing" mimetype="application/x-microsoft.net.object.bytearray.base64">
+        <value>[base64 mime encoded string representing a byte array form of the .NET Framework object]</value>
+        <comment>This is a comment</comment>
+    </data>
+                
+    There are any number of "resheader" rows that contain simple 
+    name/value pairs.
+    
+    Each data row contains a name, and value. The row also contains a 
+    type or mimetype. Type corresponds to a .NET class that support 
+    text/value conversion through the TypeConverter architecture. 
+    Classes that don't support this are serialized and stored with the 
+    mimetype set.
+    
+    The mimetype is used for serialized objects, and tells the 
+    ResXResourceReader how to depersist the object. This is currently not 
+    extensible. For a given mimetype the value must be set accordingly:
+    
+    Note - application/x-microsoft.net.object.binary.base64 is the format 
+    that the ResXResourceWriter will generate, however the reader can 
+    read any of the formats listed below.
+    
+    mimetype: application/x-microsoft.net.object.binary.base64
+    value   : The object must be serialized with 
+            : System.Runtime.Serialization.Formatters.Binary.BinaryFormatter
+            : and then encoded with base64 encoding.
+    
+    mimetype: application/x-microsoft.net.object.soap.base64
+    value   : The object must be serialized with 
+            : System.Runtime.Serialization.Formatters.Soap.SoapFormatter
+            : and then encoded with base64 encoding.
+
+    mimetype: application/x-microsoft.net.object.bytearray.base64
+    value   : The object must be serialized into a byte array 
+            : using a System.ComponentModel.TypeConverter
+            : and then encoded with base64 encoding.
+    -->
+  <xsd:schema id="root" xmlns="" xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:msdata="urn:schemas-microsoft-com:xml-msdata">
+    <xsd:import namespace="http://www.w3.org/XML/1998/namespace" />
+    <xsd:element name="root" msdata:IsDataSet="true">
+      <xsd:complexType>
+        <xsd:choice maxOccurs="unbounded">
+          <xsd:element name="metadata">
+            <xsd:complexType>
+              <xsd:sequence>
+                <xsd:element name="value" type="xsd:string" minOccurs="0" />
+              </xsd:sequence>
+              <xsd:attribute name="name" use="required" type="xsd:string" />
+              <xsd:attribute name="type" type="xsd:string" />
+              <xsd:attribute name="mimetype" type="xsd:string" />
+              <xsd:attribute ref="xml:space" />
+            </xsd:complexType>
+          </xsd:element>
+          <xsd:element name="assembly">
+            <xsd:complexType>
+              <xsd:attribute name="alias" type="xsd:string" />
+              <xsd:attribute name="name" type="xsd:string" />
+            </xsd:complexType>
+          </xsd:element>
+          <xsd:element name="data">
+            <xsd:complexType>
+              <xsd:sequence>
+                <xsd:element name="value" type="xsd:string" minOccurs="0" msdata:Ordinal="1" />
+                <xsd:element name="comment" type="xsd:string" minOccurs="0" msdata:Ordinal="2" />
+              </xsd:sequence>
+              <xsd:attribute name="name" type="xsd:string" use="required" msdata:Ordinal="1" />
+              <xsd:attribute name="type" type="xsd:string" msdata:Ordinal="3" />
+              <xsd:attribute name="mimetype" type="xsd:string" msdata:Ordinal="4" />
+              <xsd:attribute ref="xml:space" />
+            </xsd:complexType>
+          </xsd:element>
+          <xsd:element name="resheader">
+            <xsd:complexType>
+              <xsd:sequence>
+                <xsd:element name="value" type="xsd:string" minOccurs="0" msdata:Ordinal="1" />
+              </xsd:sequence>
+              <xsd:attribute name="name" type="xsd:string" use="required" />
+            </xsd:complexType>
+          </xsd:element>
+        </xsd:choice>
+      </xsd:complexType>
+    </xsd:element>
+  </xsd:schema>
+  <resheader name="resmimetype">
+    <value>text/microsoft-resx</value>
+  </resheader>
+  <resheader name="version">
+    <value>2.0</value>
+  </resheader>
+  <resheader name="reader">
+    <value>System.Resources.ResXResourceReader, System.Windows.Forms, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089</value>
+  </resheader>
+  <resheader name="writer">
+    <value>System.Resources.ResXResourceWriter, System.Windows.Forms, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089</value>
+  </resheader>
+</root>
\ No newline at end of file