fixed hang after creating configuration on connection

- config created on connection is displayed as admin (platform name) on the client management page
- added config creation time on the client management page

client/configurators/vpn_configurator.h

@@ -46,6 +46,7 @@ public:
 signals:
     void newVpnConfigCreated(const QString &clientId, const QString &clientName, const DockerContainer container,
                              ServerCredentials credentials);
+    void clientModelUpdated();
 };
 
 #endif // VPN_CONFIGURATOR_H