message: Add allow-same-origin to Element Pro dialog
  Seems to be required after all.
diff: @@ -143,7 +143,7 @@ export default class EMSElementProDialog extends React.PureComponent<IProps, ISt
  <iframe
  src={this.elementProSetupUrl}
  ref={this.iframeRef}
  - sandbox="allow-forms allow-scripts"
  + sandbox="allow-forms allow-scripts allow-same-origin"
  />
  {this.state.error &&
  <div>
  