6.3: Warnings in examples/quickcontrols2/texteditor

documenthandler.cpp: In member function 'void DocumentHandler::load(const QUrl&)':
documenthandler.cpp:199:41: warning: 'static QQmlFileSelector* QQmlFileSelector::get(QQmlEngine*)' 
   is deprecated [-Wdeprecated-declarations]
  199 |     const QUrl path = QQmlFileSelector::get(engine)->selector()->select(fileUrl);

Binding on contentItem is not deferred as requested by the DeferredPropertyNames class info because 
  it constitutes a group property.
Binding on contentItem is not deferred as requested by the DeferredPropertyNames class info because it constitutes a group property.
Binding on contentItem is not deferred as requested by the DeferredPropertyNames class info because it constitutes a group property.