Merge request image diff swipe view has no dividing line
Summary
There is no dividing line between the old and new image when swiping between them. This makes it hard to tell where they are if you don't see the handles at the top and bottom.
Steps to reproduce
Open an image diff in a merge request. Switch to swipe view
Example Project
dimitrieh/comment-on-pictures!2 (diffs)
What is the current bug behavior?
No dividing line
What is the expected correct behavior?
Dividing line
Relevant logs and/or screenshots
missing-divider-aka-great-fur-wall
Output of checks
This bug happens on GitLab.com
Possible fixes
.swipe-wrap style border-left needs to be border-right for merge request swipe view, but the old view needs to have that reset back to the left side so that it still works in commit views. I'll submit an MR
Suggested /label ~bug image diff frontend