R1:5968ed8fd806

Awesomify dragging stuff on workboards

Summary: Such fun. Many pixels. Professional PM. Much Business.

Test Plan: Move stuff in and around workboards

Reviewers: epriestley, btrahan

Reviewed By: btrahan

CC: Korvin, epriestley, aran

Differential Revision: https://secure.phabricator.com/D8007