message: Make sure captcha disappears when container does
  Should fix
diff: @@ -46,6 +46,10 @@ module.exports = React.createClass({
  };
  },
  + componentWillMount: function() {
  + this._captchaWidgetId = null;
  + },
  +
  componentDidMount: function() {
  // Just putting a script tag into the returned jsx doesn't work, annoyingly,
  // so we do this instead.
  @@ -75,6 +79,10 @@ module.exports = React.createClass({
  }
  },
  + componentWillUnmount: function() {
  + this._resetRecaptcha();
  + },
  +
  _renderRecaptcha: function(divId) {
  if (!global.grecaptcha) {
  console.error("grecaptcha not loaded!");
  @@ -90,12 +98,18 @@ module.exports = React.createClass({
  }
  console.log("Rendering to %s", divId);
  - global.grecaptcha.render(divId, {
  + this._captchaWidgetId = global.grecaptcha.render(divId, {
  sitekey: publicKey,
  callback: this.props.onCaptchaResponse,
  });
  },
  + _resetRecaptcha: function() {
  + if (this._captchaWidgetId !== null) {
  + global.grecaptcha.reset(this._captchaWidgetId);
  + }
  + },
  +
  _onCaptchaLoaded: function() {
  console.log("Loaded recaptcha script.");
  try {
  