message: fix(muc): room member list
diff: @@ -91,6 +91,7 @@ export default class MultiUserContact extends Contact {
  public join() {
  this.data.set('joinDate', new Date());
  this.data.set('memberListComplete', false);
  + this.removeAllMembers();
  return this.getService().joinMultiUserRoom(new JID(this.jid.bare, this.getNickname()), this.data.get('password'));
  }
  