- each pr version connects invalidated comments to it
- in version list we show number of comments made on each version
- show all outdated comments even for deleted files
- linkify outdated comments to first one
- added auto-collapse of commit range if they are more than 5
- styling changes, wide mode improvements
* side/side + unified support
* redesign of diff changes/operations
* added button to see file before the change
* auto collapses large diffs
refs #4232