message: Invert to be if(!form) goback
diff: @@ -560,13 +560,12 @@ module.exports = React.createClass({
  { _t('Sign in instead') }
  </a>;
  - let goBack = <a className="mx_AuthBody_changeFlow" onClick={this.onGoToFormClicked} href="#">
  + // Only show the 'go back' button if you're not looking at the form
  + let goBack;
  + if ((PHASES_ENABLED && this.state.phase !== PHASE_REGISTRATION) || this.state.doingUIAuth) {
  + goBack = <a className="mx_AuthBody_changeFlow" onClick={this.onGoToFormClicked} href="#">
  { _t('Go back') }
  </a>;
  -
  - // Don't show the 'go back' button in one specific case: when you're staring at the form.
  - if ((PHASES_ENABLED && this.state.phase === PHASE_REGISTRATION) && !this.state.doingUIAuth) {
  - goBack = null;
  }
  return (
  