message: Include decryption error in decryption failure metrics
diff: @@ -1312,7 +1312,7 @@ export default React.createClass({
  // if the decryption was a failure
  cli.on("Event.decrypted", (e) => {
  if (e.isDecryptionFailure()) {
  - Analytics.trackEvent('E2E', 'Decryption failure');
  + Analytics.trackEvent('E2E', 'Decryption failure', 'ev.content.body: ' + e.getContent().body);
  }
  });
  