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
{
				previewLabel.setForeground( ColorManager.getColor( color.getRGB( ) ) );
				previewLabel.redraw( );
			}
		} );
		Composite fstyle = new Composite( format, 0 );
		gdata = new GridData( );
		gdata.horizontalSpan = 4;
		fstyle.setLayoutData( gdata );
		fstyle.setLayout( new GridLayout( 4, false ) );
		bold = createToggleButton( fstyle );
		bold.setImage( ReportPlatformUIImages.getImage( AttributeConstant.FONT_WIDTH ) );
		bold.addSelectionListener( new SelectionAdapter( ) {
			public void widgetSelected( SelectionEvent e )
			{
				isBoldChanged = true;
				updatePreview( );
			}
		} );
		bold.setToolTipText( Messages.getString( "HighlightRuleBuilderDialog.tooltip.Bold" ) );
		italic = createToggleButton( fstyle );
		italic.setImage( ReportPlatformUIImages.getImage( AttributeConstant.FONT_STYLE ) );
		italic.addSelectionListener( new SelectionAdapter( ) {
			public void widgetSelected( SelectionEvent e )
			{
				isItalicChanged = true;
				updatePreview( );
			}
		} );
		italic.setToolTipText( Messages.getString( "HighlightRuleBuilderDialog.tooltip.Italic" ) );