Qt 5.7 drops support for QtWebKit which is replaced by QtWebEngine

We have two files to port: WMainWindow and WQtModuleMetaInfo. Most of the Functionality from QWebFrame has migrated to QWebEnginePage. However, when done I get a black MainWindow as well as a black ModuleMetaInfo widget. So I missed something obvious? This site help porting from WebKit to WebEngine: https://wiki.qt.io/Porting_from_QtWebKit_to_QtWebEngine

(from redmine: created on 2016-06-24)