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/internal/ui/util/UIUtil.java
IEditorPart activeEditor = ( (IReportEditor) part ).getEditorPart( );
			if ( activeEditor instanceof AbstractMultiPageEditor )
			{
				reportEditor = (AbstractMultiPageEditor) activeEditor;
			}
		}
		if ( reportEditor == null
				|| !( reportEditor.getActivePageInstance( ) instanceof GraphicalEditorWithFlyoutPalette ) )
		{
			return null;
		}
		return ( (GraphicalEditorWithFlyoutPalette) reportEditor.getActivePageInstance( ) ).getGraphicalViewer( );
	}
	/**
	 * Creates a new grid layout without margins by default
	 * 
	 * @return the layout created
	 */
	public static GridLayout createGridLayoutWithoutMargin( )
	{
		GridLayout layout = new GridLayout( );
		layout.marginHeight = layout.marginWidth = 0;
		return layout;
	}
	/**
	 * Creates a new grid layout without margins with given the number of
	 * columns, and whether or not the columns should be forced to have the same
	 * width
	 * 
	 * @param numsColumn