R1:53940e272f3e

Add standard spacing around viewing panels

Summary: Just wraps them in some boxes in edit and standalone mode.

Test Plan: Tested 3 panels in edit and standalone mode.

Reviewers: btrahan, epriestley

Reviewed By: epriestley

Subscribers: epriestley, Korvin

Differential Revision: https://secure.phabricator.com/D9232