message: fix presavecallback called twice if params in wifi
diff: @@ -1667,7 +1667,7 @@ void WiFiManager::handleWifiSave() {
  handleRequest();
  // @todo use new callback for before paramsaves
  - if ( _presavecallback != NULL) {
  + if (!_paramsInWifi && _presavecallback != NULL) {
  _presavecallback();
  }
  