Summary:
- Affects the "Inline Comments" summary table which appears in comments that have attached inlines in the discussion threads in Differential.
- Prepares for inclusion in Diffusion.
- No application changes (minor CSS), just factors code better.
- Simplify/separate CSS.
Test Plan: Looked at on-diff and off-diff comment summaries in Differential, display looked correct.
Reviewers: davidreuss, nh, btrahan
Reviewed By: davidreuss
CC: aran, epriestley
Maniphest Tasks: T904
Differential Revision: https://secure.phabricator.com/D1928
