Bug 120218 Right click menu option to apply theme.
We should support the following right click menu. -- User right clicks int he report design layout area. -- The following menu items needs to be supported Theme --> Apply Theme -->Theme1 -->Theme2 ( similar to Apply style menu option )
UI/org.eclipse.birt.report.designer.core/src/org/eclipse/birt/report/designer/util/DEUtil.java
while ( itor.hasNext( ) )
		{
			account = account + 1;
			itor.next( );
		}
		return account;
	}
	/**
	 * Get default slot id of give container element
	 * 
	 * @param parent
	 * @return slot id, -1 if not found
	 */
	public static int getDefaultSlotID( Object parent )
	{
		int slotID = -1;
		if ( parent instanceof GraphicMasterPageHandle )
		{
			slotID = GraphicMasterPageHandle.CONTENT_SLOT;
		}
		else if ( parent instanceof ParameterGroupHandle )
		{
			slotID = ParameterGroupHandle.PARAMETERS_SLOT;
		}
		else if ( parent instanceof ReportDesignHandle )
		{
			slotID = ReportDesignHandle.BODY_SLOT;
		}
		else if ( parent instanceof LibraryHandle )
		{