Bug 146159 [Regression]Changing font operation doesn't work other than the first time
Description: The first time changing operation can work well. However, Change it again, it won't work. Steps: 1.Insert lable/text to layout or master page 2.Change the font from serif to cursive, it works well 3.Change the font again Result: The action doesn't work Additional infor: build number:200606080632
UI/org.eclipse.birt.report.designer.core/src/org/eclipse/birt/report/designer/util/DEUtil.java
return Arrays.asList( themesArray ).iterator( );
	}
	/**
	 * Generates GroupElementHandle for given model list.
	 * 
	 * @param modelList
	 * @return
	 */
	public static GroupElementHandle getGroupElementHandle( List modelList )
	{
		if ( SessionHandleAdapter.getInstance( ).getReportDesignHandle( ) == null )
		{
			return GroupElementFactory.newGroupElement( SessionHandleAdapter
					.getInstance( ).getReportDesignHandle( ),
					Collections.EMPTY_LIST );
		}
		return GroupElementFactory.newGroupElement( SessionHandleAdapter
				.getInstance( ).getReportDesignHandle( ), modelList );
	}
	/**
	 * Checks if the library is included.
	 * 
	 * @param handle
	 * @return
	 */
	public static boolean isIncluded( LibraryHandle handle )
	{
		return handle.getNamespace( ) != null;
	}
	public static List getClasses( )