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.ui/src/org/eclipse/birt/report/designer/ui/dialogs/HighlightRuleBuilder.java
} );
		if ( font.getItemCount( ) > 0 )
		{
			font.select( 0 );
		}
		size = new FontSizeBuilder( format, SWT.None );
		if ( designHandle != null )
		{
			size.setDefaultUnit( designHandle.getPropertyHandle( StyleHandle.FONT_SIZE_PROP )
					.getDefaultUnit( ) );
		}
		gdata = new GridData( );
		gdata.widthHint = 120;
		size.setLayoutData( gdata );
		size.setFontSizeValue( null );
		size.addListener( SWT.Modify, new Listener( ) {
			public void handleEvent( Event event )
			{
				updatePreview( );
			}
		} );
		color = new ColorBuilder( format, 0 );
		gdata = new GridData( );
		gdata.widthHint = 50;
		color.setLayoutData( gdata );
		color.setChoiceSet( ChoiceSetFactory.getElementChoiceSet( ReportDesignConstants.STYLE_ELEMENT,
				StyleHandle.COLOR_PROP ) );
		color.setRGB( null );
		color.addListener( SWT.Modify, new Listener( ) {
			public void handleEvent( Event event )