message: actually start verify process in verification panel
  temporary code, as ux is not complete
diff: @@ -22,6 +22,7 @@ export default class VerificationPanel extends React.PureComponent {
  constructor(props) {
  super(props);
  this.state = {};
  + this._hasVerifier = !!props.request.verifier;
  }
  render() {
  @@ -53,12 +54,10 @@ export default class VerificationPanel extends React.PureComponent {
  _startSAS = async () => {
  const verifier = this.props.request.beginKeyVerification(verificationMethods.SAS);
  - verifier.on('show_sas', this._onVerifierShowSas);
  try {
  - await this._verifier.verify();
  + await verifier.verify();
  } finally {
  this.setState({sasEvent: null});
  - verifier.removeListener('show_sas', this._onVerifierShowSas);
  }
  };
  @@ -75,6 +74,18 @@ export default class VerificationPanel extends React.PureComponent {
  };
  _onRequestChange = () => {
  + const {request} = this.props;
  + if (!this._hasVerifier && !!request.verifier) {
  + request.verifier.on('show_sas', this._onVerifierShowSas);
  + try {
  + request.verifier.verify();
  + } catch (err) {
  + console.error("error verify", err);
  + }
  + } else if (this._hasVerifier && !request.verifier) {
  + request.verifier.removeListener('show_sas', this._onVerifierShowSas);
  + }
  + this._hasVerifier = !!request.verifier;
  this.forceUpdate();
  };
  