Make it easier to revert changes

Proposal

Make it easier to revert a commit and to revert an entire MR from the UI. Consider the feedback from the Q1Y23 usability study: https://www.figma.com/proto/mF555KKsf1m1UyyXbWxXu2/Benchmarking-Slides?node-id=70%3A2167&scaling=min-zoom&page-id=40%3A124&starting-point-node-id=943%3A12915