It is not clear how to start a review when viewing changes on a merge request (usability and accessibility issue)
Problem statement
It is extremely difficult to figure out how to start a review when viewing the "Changes" tab on a merge request. Every time I use a different interface (e.g. GitHub) for awhile and come back, I spend a good 5 minutes moving my cursor and clicking in various places in the UI trying to comment on lines in the merge request. The little flag only appears when hovering with the cursor, which is an accessibility issue, and only when you hover over exactly the one vertical line to the left of the line numbers (both a usability and accessibility issue). There is also no menu option or button for "Start a review", which I would expect.
Proposed resolution
- Add an explicitly labeled user interface element (ideally a button) that allows the user to start a review.
- Make it easier and more obvious how one can comment on specific lines of the change set for the review.