Manager: Update machine configuration on change

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

src/qt/qt_vmmanager_clientsocket.hpp

@@ -44,6 +44,7 @@ signals:
 
 public slots:
     void clientRunningStateChanged(VMManagerProtocol::RunningState state) const;
+    void configurationChanged() const;
 
 private:
     QString server_name;