Ability to list files with viewed/not viewed info

While reviewing many files in a PR, it is hard to identify which files have or haven't been viewed yet. The user needs to arrow through nearly every file to find and identify the files.

It would be great if we could have a list in the UI to view if the files in a PR have or haven't been viewed yet. This is needed as Bitbucket won't allow all files to be viewed at once and forces users to arrow through one file at a time.