Bug 175664 [Mac] Unexpected internal exception occurs when invoke expression builder
Description: There are two problems: 1. "fx" button (Click this button to invoke Expression Builder) could not be displayed correctly, nothing displayed in the button. 2. Click on the button, an unexpected internal exception occurs. Version:2.2.0.v20070205 Steps to reproduce: 1.Insert a Data item to the layout. Click "fx" button to invoke the expression builder, although on Mac "fx" button could not display correctly. Error log: Argument cannot be null Plug-in Provider: Eclipse.org Plug-in Name: BIRT Designer UI Plug-in ID: org.eclipse.birt.report.designer.ui Error Code: Error.GUIException.invokedByUnexpectedException Error Message:Argument cannot be null
UI/org.eclipse.birt.report.designer.ui/src/org/eclipse/birt/report/designer/internal/ui/util/UIUtil.java
}
		}
		return null;
	}
	public static ThemeHandle applyTheme( ThemeHandle handle,
			ModuleHandle moduleHandle, LibraryHandle library )
	{
		if ( handle.getRoot( ) == moduleHandle )
		{
			try
			{
				moduleHandle.setTheme( handle );
			}
			catch ( SemanticException e )
			{
								
				GUIException exception = GUIException.createGUIException( ReportPlugin.REPORT_UI,
						e,
						"Library.DND.messages.cannotApplyTheme" );
				ExceptionHandler.handle( exception );	
			}
			return handle;
		}
		ThemeHandle applyThemeHandle = themeInModuleHandle( handle,
				moduleHandle );
		if ( applyThemeHandle != null )
		{
			try
			{
				moduleHandle.setTheme( applyThemeHandle );