message: translate otr status messages
diff: @@ -174,7 +174,7 @@ export default class Session {
  let message = new Message({
  peer: this.peer.getJid(),
  direction: Message.DIRECTION.SYS,
  - plaintextMessage: messageString
  + plaintextMessage: Translation.t(messageString)
  });
  this.peer.getTranscript().pushMessage(message);
  