message: Allow popups from host signup dialog
diff: @@ -251,7 +251,7 @@ export default class HostSignupDialog extends React.PureComponent<IProps, IState
  <iframe
  src={this.config.url}
  ref={this.iframeRef}
  - sandbox="allow-forms allow-scripts allow-same-origin"
  + sandbox="allow-forms allow-scripts allow-same-origin allow-popups"
  />
  }
  </div>
  