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
}
	/**
	 * Gets table edit part.
	 * 
	 * @return The current selected table edit part, null if no table edit part
	 *         is selected.
	 */
	protected TableEditPart getTableEditPart( )
	{
		if ( getSelection( ) == null || getSelection( ).isEmpty( ) )
			return null;
		List list = getSelection( );
		int size = list.size( );
		TableEditPart part = null;
		for ( int i = 0; i < size; i++ )
		{
			Object obj = getSelection( ).get( i );
			if ( i == 0 && obj instanceof ReportElementEditPart )
			{