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
* Property name for element labelContent.
	 */
	public static final String ELEMENT_LABELCONTENT_PROPERTY = "labelContent"; 
	private static HashMap propertiesMap = new HashMap( );
	private static ArrayList notSupportList = new ArrayList( );
	static
	{
		propertiesMap.put( LabelHandle.TEXT_PROP, ELEMENT_LABELCONTENT_PROPERTY );
		propertiesMap.put( TextItemHandle.CONTENT_PROP,
				ELEMENT_LABELCONTENT_PROPERTY );
		
		notSupportList.add( DesignEngine.getMetaDataDictionary( )
				.getElement( ReportDesignConstants.LINE_ITEM ) );
		notSupportList.add( DesignEngine.getMetaDataDictionary( )
				.getElement( ReportDesignConstants.TEMPLATE_REPORT_ITEM ) );
		notSupportList.add( DesignEngine.getMetaDataDictionary( )
				.getElement( ReportDesignConstants.FREE_FORM_ITEM ) );
		notSupportList.add( DesignEngine.getMetaDataDictionary( )
				.getElement( ReportDesignConstants.GRAPHIC_MASTER_PAGE_ELEMENT ) );
	}
	/**
	 * Gets the support list of the given parent element and the slotID.
	 * 
	 * @param parent
	 *            the parent element
	 * @param slotId
	 *            the slotID
	 * @return the element list that is supported with the given parent element
	 *         and in the given slotID
	 */