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
format.setLayout( glayout );
		lb = new Label( format, 0 );
		lb.setText( Messages.getString( "HighlightRuleBuilderDialog.text.Font" ) ); 
		lb = new Label( format, 0 );
		lb.setText( Messages.getString( "HighlightRuleBuilderDialog.text.Size" ) ); 
		lb = new Label( format, 0 );
		lb.setText( Messages.getString( "HighlightRuleBuilderDialog.text.Color" ) ); 
		createDummy( format, 4 );
		font = new Combo( format, SWT.READ_ONLY );
		gdata = new GridData( );
		gdata.widthHint = 100;
		font.setLayoutData( gdata );
		IChoiceSet fontSet = ChoiceSetFactory.getElementChoiceSet( ReportDesignConstants.STYLE_ELEMENT,
				StyleHandle.FONT_FAMILY_PROP );
		font.setData( fontSet );
		font.setItems( ChoiceSetFactory.getDisplayNamefromChoiceSet( fontSet,
				new AlphabeticallyComparator( ) ) );
		if ( SYSTEM_FONT_LIST != null && SYSTEM_FONT_LIST.length > 0 )
		{
			for ( int i = 0; i < SYSTEM_FONT_LIST.length; i++ )
			{
				font.add( SYSTEM_FONT_LIST[i] );
			}
		}
		font.add( DEFAULT_CHOICE, 0 );
		font.addSelectionListener( new SelectionAdapter( ) {
			public void widgetSelected( SelectionEvent e )
			{
				updatePreview( );
			}