Toggle file comments in merge request does not update toggle buttons
Summary
Follow-up from https://gitlab.com/gitlab-org/gitlab-ce/merge_requests/17011:
When clicking the Toggle comments for this file button on a merge request, the individual toggle buttons of the discussions don't get updated and also collapsed discussions don't get expanded.
Steps to reproduce
- open merge request with discussions
- click
Toggle comments for this filebutton
What is the current bug behavior?
- discussion on the left is not expanded
- toggle button on the right is not updated