src/vs/workbench/contrib/comments/browser/commentReply.ts/CommentReply/updateCommentThread
class CommentReply:	public updateCommentThread(commentThread: languages.CommentThread<IRange | ICellRange>) {
		const isReplying = this.commentEditor.hasTextFocus();

		if (!this._reviewThreadReplyButton) {
			this.createReplyButton(this.commentEditor, this.form);
		}

		if (this._commentThread.comments && this._commentThread.comments.length === 0) {
			this.expandReplyArea();
		}

		if (isReplying) {
			this.commentEditor.focus();
		}
	}