message: Fix subscription useEffect
diff: @@ -65,7 +65,7 @@ const AppServiceModal = (props: Props) => {
  }, []);
  React.useEffect(() => {
  - if (appName === "") {
  + if (subscription !== "" && appName === "") {
  GetValidAppServiceName(projectName, vscode)
  .then(event => setAppName(event.data.payload.validName));
  }
  