message: Remove user avatar from new comment form on threads
diff: @@ -543,6 +543,14 @@ a.tabnav-extra[href$='mastering-markdown/'] {
  display: none !important;
  }
  +/* Remove user avatar from new comment form on threads */
  +.review-thread-reply .avatar {
  + display: none;
  +}
  +.review-thread-reply .review-thread-reply-button {
  + margin-left: 0;
  +}
  +
  /* Move labels in the Issue/PR list below the title */
  .js-issue-row .lh-condensed {
  display: flex;
  