QDS-11411 Material Bundle crashes

This MR brings the following features;

• Better memory management
• Small performance enhancements

src/main.cpp

@@ -93,6 +93,5 @@ int main(int argc, char *argv[])
     view.showMaximized();
 
     backend->initialize();
-    backend->registerUser(QUrl("17e8907b3b84b8206d45be4f551f4e25"));
     return app.exec();
 }