What does this MR do?
Fixes regression issue related to the MR window sliding behind the right sidebar on page refresh.
Are there points in the code the reviewer needs to double check?
I'm getting stuck thinking about if/how to test this. Or maybe it just deserves a note somewhere about remembering to update
page_gutter_class when a new route is added?
Why was this MR needed?
This regression prevented users from using many features of the MR view.
What are the relevant issue numbers?
Screenshots (if relevant)
Does this MR meet the acceptance criteria?
CHANGELOG entry added
API support added
Added for this feature/bug
All builds are passing
Conform by the style guides
Branch has no merge conflicts with
master(if you do - rebase it please)
Squashed related commits together