Pagination doesn't work for comments on topic page

Problem/Motivation

Pagination doesn't work for comments on topic page.

Steps to reproduce

1. Log in as a regular user and create a topic with 60 comments.
2. When you press the "next" button of the pager in the comments section then you should see comments from 51st to 60th.

Proposed resolution

Add selector of the content wrapper to AJAX command which replacing content in page main section after switching page through comments pagination.