Automatically load next diff when previous is marked as viewed

[hughpv]

I have a PR open with over 1,000 files changed. Understandably, the PR viewer stops loading diffs beyond a certain point.

So I find myself going through a cycle:

• Click "Load diff"
• Review changes
• Mark as viewed
• Repeat

It would be awesome if the "Mark as viewed" action also triggered a load of the next diff if it's not already rendered.

P.S. here's a plug for #10197 while I'm at it. I would love it if I could just knock out the whole PR by tapping J over and over again.

[oleg-erom]

Or add a button "Load next 10 files"

[david-kariuki]

Honestly this would be a good addition. Clicking Load Diff on a PR with hundreds of files is hectic