Add a Stacked view for PropertyList

Summary: Turns a Property List into a stacked view like on tablet/mobile. Useful for where text is longer.

Test Plan:
Test a Herald Transcript page

Reviewers: btrahan, epriestley

Reviewed By: epriestley

Subscribers: epriestley, Korvin

Differential Revision: https://secure.phabricator.com/D8891