Manager: Update machine configuration on change

(signaled by the VM or upon closing the standalone settings dialog)

src/qt/qt_vmmanager_main.hpp

@@ -78,6 +78,7 @@ public slots:
 #endif
     void modelDataChange();
     void onPreferencesUpdated();
+    void onConfigUpdated(const QString &uuid);
     int  getActiveMachineCount();
 
 private: