Ability to view / group only unreviewed files

Hey Github!

I have a small feature request, which could help out when reviewing huge PRs in many iterations.
Right now we have a nice feature where user can mark files as “viewed” and they can be selected to be collapsed.

Is it possible to add some sort of additional filter filter which will group files in a way, that “unreviewed files” will be grouped on top?

Rationale: When having long running PRs with many files, they tend to accumulate over time many commits with feedback, and reviewers when doing partial reviews have to scroll through many viewports to find either new unreviewed files or “changed reviewed files”, which is a bit cumbersome.

Would love to hear you feedback on this.