message: Track an event name when tracking a decryption failure
  Otherwise piwik will not agregate the failures correctly for all views.
diff: @@ -1306,7 +1306,7 @@ export default React.createClass({
  const dft = new DecryptionFailureTracker((total) => {
  // TODO: Pass reason for failure as third argument to trackEvent
  - Analytics.trackEvent('E2E', 'Decryption failure', null, total);
  + Analytics.trackEvent('E2E', 'Decryption failure', 'unspecified_error', total);
  });
  // Shelved for later date when we have time to think about persisting history of
  