Problem Definition

When reviewing a pull request with files loaded individually, if the reviewer wants to move to the next unviewed file (a file that hasn't marked as Viewed), they can check the file tree on the left and look for files whose names are in bold. The Previous and Next buttons can also be used to navigate to the files.

However, this can be a bit slow and difficult with pull requests that have a large number of files, especially when many of the files have already been marked as Viewed.

Suggested Solution

Similarly to the Previous and Next buttons, provide buttons for the Previous unviewed and Next unviewed, so that reviewers can more easily navigate to the files that haven't been marked as Viewed yet.