Add back the motivator panel

Summary: Fixes T12226, Ref D17233. Resurrects the motivator panel.

Test Plan: Add panel, see fact on hover.

Reviewers: epriestley

Reviewed By: epriestley

Subscribers: yelirekim, jcox, Korvin

Maniphest Tasks: T12226

Differential Revision: https://secure.phabricator.com/D17324