/// <summary>
		/// Opens the symbol list editor.
		/// </summary>
		/// <param name="sender">
		/// A <see cref="System.Object"/>
		/// </param>
		/// <param name="arg">
		/// A <see cref="EventArgs"/>
		/// </param>
		private void OnSymbolListEditorItem(object sender, EventArgs arg)
		{
			SymbolLabelDialog dialog = 
				new SymbolLabelDialog(mainWindow);
			
			dialog.Show();
			dialog.Destroy();
		}		
		/// <summary>
		/// Handles the activation of the edit symbols menu item.
		/// </summary>
		/// <param name="sender">
		/// A <see cref="System.Object"/>
		/// </param>
		/// <param name="args">
		/// A <see cref="EventArgas"/>
		/// </param>
		private void OnSymbolsEditItemActivate(object sender, EventArgs args)
		{
			SymbolLabelDialog dialog = 
				new SymbolLabelDialog(mainWindow);
			
			dialog.Show();
			dialog.Destroy();
			
			symbolLabelEditor.LoadSymbols();
			
		}