Buttons "next branch" and "previous branch" in the comments

Each comment thread has its own theme, which is set by the first comment in it. When there are a lot of comments (like, for example, here habrahabr.ru/blogs/copyright/110185 ) there is a desire to read not all branches, but only on topics close to you. Now there is no opportunity to quickly find the beginning of the next or previous branch, but I would like to have this opportunity.