/// <summary>Called when the user wants to select a single table as replacement for the selected tables.</summary>
        private void EhChooseTableForSelectedItems()
        {
            var tableSel = new Altaxo.Gui.Worksheet.SingleTableChoice();

            if (Current.Gui.ShowDialog(ref tableSel, "Choose new table for selected items", false))
            {
                var newTable = tableSel.SelectedTable;
                foreach (var entry in _tableList)
                {
                    if (entry.IsSelected)
                    {
                        ((MyXTableListNode)entry).NewTable = newTable;
                    }
                }
            }
        }
		/// <summary>Called when the user wants to select a single table as replacement for the selected tables.</summary>
		private void EhChooseTableForSelectedItems()
		{
			var tableSel = new Altaxo.Gui.Worksheet.SingleTableChoice();

			if (Current.Gui.ShowDialog(ref tableSel, "Choose new table for selected items", false))
			{
				var newTable = tableSel.SelectedTable;
				foreach (var entry in _tableList)
				{
					if (entry.IsSelected)
					{
						((MyXTableListNode)entry).NewTable = newTable;
					}
				}
			}
		}