Bug 119216 Regression: Group can't be added in layout editor.
Description: Group can't be added in layout editor. Steps to reproduce: 1. Add a table. 2. Right click on the table and find that "insert group" is grayed out.
UI/org.eclipse.birt.report.designer.ui/src/org/eclipse/birt/report/designer/internal/ui/editors/schematic/actions/InsertGroupActionFactory.java
{
			System.out.println( "Insert group action >> Run ..." ); 
		}
		CommandStack stack = getActiveCommandStack( );
		stack.startTrans( STACK_MSG_ADD_GROUP );
		boolean retValue = false;
		if ( getTableEditPart( ) != null )
		{
			retValue = getTableEditPart( ).insertGroup( getPosition( ) );
		}
		else
		{
			retValue = getListEditPart( ).insertGroup( getPosition( ) );
		}
		if ( retValue )
		{
			stack.commit( );
		}
		else
		{
			stack.rollbackAll( );
		}
	}
	protected boolean isGroup( )
	{
		if ( getRowHandle( ) != null )
		{
			return getRowHandle( ).getContainer( ) instanceof GroupHandle;
		}
		else if ( getListBandProxy( ) != null )