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
*/
	public static String[] getSystemFontNames( Comparator comparator )
	{
		GraphicsEnvironment ge = GraphicsEnvironment.getLocalGraphicsEnvironment( );
		String[] fontNames = ge.getAvailableFontFamilyNames( );
		if ( comparator != null )
		{
			Arrays.sort( fontNames, comparator );
		}
		return fontNames;
	}
	/**
	 * Gets the tool used to process multil-selection.
	 * 
	 * @param modelList
	 *            DE model list.
	 * @return The tool used to process multil-selection.
	 */
	public static GroupElementHandle getMultiSelectionHandle( List modelList )
	{
		ModuleHandle designHandle = SessionHandleAdapter.getInstance( )
				.getReportDesignHandle( );
		GroupElementHandle handle = new GroupElementHandle( designHandle,
				modelList );
		return handle;
	}
	/**
	 * Escapes \ and " following standard of Javascript
	 * 
	 * @param str