message: Don't clear field on failure
diff: @@ -131,15 +131,18 @@ export default class SetIdServer extends React.Component {
  const fullUrl = unabbreviateUrl(this.state.idServer);
  const errStr = await checkIsUrl(fullUrl);
  +
  + let newFormValue = this.state.idServer;
  if (!errStr) {
  MatrixClientPeg.get().setIdentityServerUrl(fullUrl);
  localStorage.setItem("mx_is_url", fullUrl);
  + newFormValue = '';
  }
  this.setState({
  busy: false,
  error: errStr,
  currentClientIdServer: MatrixClientPeg.get().getIdentityServerUrl(),
  - idServer: '',
  + idServer: newFormValue,
  });
  };
  