Don't use contextProperty to make KAboutData available on QML
requested to merge work/fhek/do_not_use_context_property_to_make_about_data_available_on_qml into master
Context properties always takes in a QVariant, which means that whenever you access the property it is re-evaluated because in between each access the property may be changed as setContextProperty() can be used at any moment in time.