Reduce size of "Unbreak Now" and "Needs Triage" panels when no action is
required

Summary: Make these things like 1/4th the size if they aren't actionable.

Test Plan: Loaded home page with actionable, unactionable panels.

Reviewers: btrahan

Reviewed By: btrahan

CC: aran, epriestley

Differential Revision: https://secure.phabricator.com/D1613