Fix PR review pages under new PR experience

[alejandro5042]

Fix the individual PR pages under the new experience.

https://devblogs.microsoft.com/devops/introducing-the-new-pull-request-experience-for-azure-repos/ ?

Context

• Extension Version: 2.41.4
• Browser: All
• URL: All

[alejandro5042]

Notes from July 24, 2020:

To upgrade to the new PR experience, here are some todos:

• Remove file checkboxes - it is now obsolete
• Remove base update selector - it is now obsolete
• Remove or fix access keys to PR tabs (unnecessary, can re-add if people complain) -- Fixed it actually!
• Redo note/await comments
• Redo ownership highlighting in PR file tree
• Redo trophies
• Redo makePullRequestDiffEasierToScroll - REMOVED
• Remove label styling or just add draft label styling - unnecessary, can add if ppl complain
• Remove old code in bypass owners reminder
• Remove NI Code of the day

[alejandro5042]

This issue is now at the top of the list since AzDO rolled out the new PR experience by default for everyone.

[jerone]

I would love for the PR trophies to be working again for the "new" layout. 👍