Add remind user to execute empty scan.

src/dialogs/DialogManager.cpp

@@ -113,6 +113,7 @@ void DialogManager::requestLogin(QWidget* aParent)
         mFunctionDialog->exec();
     }
     releaseTopWidget(mFunctionDialog);
+    EventCenter::Default()->triggerEvent(GUIEvents::LoginSuccess,nullptr,nullptr);
 }
 
 void DialogManager::requestScreenSaverPlay()