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
{
		this.handle = handle;
		this.handleCount = handleCount;
	}
	public void setDesignHandle( DesignElementHandle handle )
	{
		this.designHandle = handle;
	}
	/**
	 * Returns current highlight rule handle, this handle can be newly created
	 * or set by the updateHandle method.
	 * 
	 * @return highlight rule handle.
	 */
	public HighlightRuleHandle getHandle( )
	{
		return handle;
	}
	private Text createText( Composite parent )
	{
		Text txt = new Text( parent, SWT.BORDER );
		GridData gdata = new GridData( GridData.FILL_HORIZONTAL );
		gdata.widthHint = 100;
		txt.setLayoutData( gdata );
		return txt;
	}
	private void fillExpression( Combo control )
	{
		String te = "";
		if ( handle != null )