Scroll on overflow of property list (mobile)

Summary: Fixes T9314. Functionally phui-status-list should get moved off a table, but that's another day. This catches many other possible issues.

Test Plan: Review changes on a narrow browser.

Reviewers: epriestley

Reviewed By: epriestley

Subscribers: Korvin

Maniphest Tasks: T9314

Differential Revision: https://secure.phabricator.com/D14036