R1:697e47459e05

Allow phui-closed-tag to be readable on hover

Summary: In general these are fairly readable, but if not it cleans up on hover (and hover card).

Test Plan: tested a closed task in my sandbox

Reviewers: epriestley

Reviewed By: epriestley

Subscribers: epriestley, Korvin

Differential Revision: https://secure.phabricator.com/D9158