Restore quote and warning behaviors to Differential EditEngine comment area
Summary: Ref T11114. This restores warnings (e.g., failing unit tests) and fixes "Quote" behavior for comments.
Test Plan:
- Quoted a comment.
- Viewed a warning.
{F2283275}
Reviewers: chad
Reviewed By: chad
Maniphest Tasks: T11114
Differential Revision: https://secure.phabricator.com/D17117