message: fix(muc): escape nickname
  fix
diff: @@ -107,7 +107,7 @@ export default class MultiUserChatWindow extends ChatWindow {
  }
  public removeMember(nickname: string) {
  - let m = this.memberlistElement.find('li[data-nickname="' + nickname + '"]');
  + let m = this.memberlistElement.find('li[data-nickname="' + nickname.replace(/"/g, '\\"') + '"]');
  if (m.length > 0) {
  m.remove();
  @@ -205,7 +205,7 @@ export default class MultiUserChatWindow extends ChatWindow {
  };
  private getMemberElementByNickname(nickname: string) {
  - return this.memberlistElement.find('.li[data-nickname="' + nickname + '"]');
  + return this.memberlistElement.find('.li[data-nickname="' + nickname.replace(/"/g, '\\"') + '"]');
  }
  private enable() {
  