Guide users towards editing capabilities in review mode of Web IDE
follow up from https://gitlab.com/gitlab-org/gitlab-ce/merge_requests/18501#note_70912918
Problem
We have enabled edit capabilities in the reivew of the web ide, however this is not clear, only when clicking the right side of the diff.
Proposal
Can we add an overlay like the example when clicking on the left (uneditable) side of the diff editor?
I think this could be an mvp as is (if it can be implemented as a stretch as suggested in the discussion), but could potentially be improved in the future
Design
Gutter: white
Uneditable area: #fafafa
Edited by Tim Zallmann