View 2-up / swipe / onion skin controls for merge request diff containing an image
Description
- View the 2-up / swipe / onion skin controls for a merge request diff containing an image.
- View the controls in the branch compare view.
- The controls are already visible in the commit view, but not in the other views.
Context
- It's important to clean up our existing features to prepare for https://gitlab.com/gitlab-org/gitlab-ce/issues/2641.
Reproduced here
- Controls visible in file commit view: https://gitlab.com/dimitrieh/comment-on-pictures/commit/13f9de003b01520a089212f89b998e231998db5d
- Controls not visible in merge request diff: https://gitlab.com/dimitrieh/comment-on-pictures/merge_requests/2/diffs