message: Add allow-presentation permission to iframe sandbox permissions
diff: @@ -182,7 +182,7 @@ export default React.createClass({
  // hosted on the same origin as the client will get the same access as if you clicked
  // a link to it.
  const sandboxFlags = "allow-forms allow-popups allow-popups-to-escape-sandbox "+
  - "allow-same-origin allow-scripts";
  + "allow-same-origin allow-scripts allow-presentation";
  const parsedWidgetUrl = url.parse(this.state.widgetUrl);
  let safeWidgetUrl = '';
  if (ALLOWED_APP_URL_SCHEMES.indexOf(parsedWidgetUrl.protocol) !== -1) {
  