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
{
			return getListBandProxy( ).getElemtHandle( ) instanceof GroupHandle;
		}
		return false;
	}
	/**
	 * Returns if the order is reverse
	 * 
	 * @return true when slot is not footer
	 */
	protected boolean isNotReverse( )
	{
		return true;