Mark files as reviewed from Multi File Diff Editor (Open Changes)

[IllusionMH]

When I checkout new PR it automatically opens multi file editor with all changed files. It would be extremely helpful to "weed out" simple/clear etc. changes and mark them as reviewed so I can proceed to review of more important changes quickly.
Ideally it would also mimic GH behavior (collapse reviewed files) when marked as reviewed (let me know if I need to create another issue for this one).

Currently when I pull PR I usually close "Changes in Pull Request #XXX" tab and switch to browser for this initial check and mark reviewed run on GH directly.

[alexr00]

It would be great to be able to programmatically collapse the files. @hediet in case this is something you're considering adding.