Highlight currently focused/viewed file in file tree
When there are many files to review and using the file tree to jump between them, I want to know which file I am looking at currently and which files I've reviewed and which I haven't.
Phabricator's Differential review interface has a visual queue for the currently focused/viewed file.
- Add visual style for currently viewed diff/file
- Add visual style for unread diffs – we do not need to store this information in the first iteration, page load will reset state
|Mockup: unread files||Mockup: read with active state|