R1:43be66d8b9e7

Fix 'Not Done' button hover state on inline comments

Summary: This rule was missing.

Test Plan: Test a comment where "Not Done" was present. Hover over button, it doesn't change.

Reviewers: epriestley

Reviewed By: epriestley

Subscribers: Korvin, epriestley

Differential Revision: https://secure.phabricator.com/D12193