Break white-space on tags in any property list

Summary: Fixes T11209. We want to always break tags when displaying them in a list, but not in general (remarkup).

Test Plan: Fake a tag on a differental revision with a really long name. See wrapping.

Reviewers: avivey, epriestley

Reviewed By: avivey, epriestley

Subscribers: avivey, Korvin

Maniphest Tasks: T11209

Differential Revision: https://secure.phabricator.com/D16175