Bug 130094 [regression] cannot edit group in Cheat Sheets
steps to reproduce: - create a report using Grouped Listing template - switch to Cheat Sheets, start/restart the tutorial - follow the steps to 1) create data source; 2) create data set; 3) bind the data to the table; and 4) edit the group expected behavior: - group dialog should be displayed actual behavior: - error message displayed. please refer to the attached image for detail
UI/org.eclipse.birt.report.designer.ui.editors.schematic/src/org/eclipse/birt/report/designer/ui/actions/cheatsheets/TemplateBaseAction.java
/**
	 * show an error dialog asking to select the applicable element for that
	 * action
	 */
	protected abstract void showErrorWrongElementSelection( );
	/**
	 * Check that the viewer selection is a good match for this action
	 * 
	 * @param viewer
	 *            The Edit Part viewer
	 */
	protected EditPart matchSelectionType( AbstractEditPartViewer viewer )
	{
		EditPart part = null;
		List editParts = viewer.getSelectedEditParts( );
		for ( Iterator iter = editParts.iterator( ); iter.hasNext( ); )
		{
			Object iterEditPart = iter.next( );
			if ( checkType( iterEditPart.getClass( ) ) )
			{
				part = (EditPart) iterEditPart;
				break;
			}
		}
		return part;
	}
	/**
	 * Check if the type is appropriate for this action
	 * 
	 * @param class1