New hovercard UI for Maniphest Tasks

Summary: Swaps out hovercard boring view for super cool workboard card view. Will have more diffs to add additional information down the road.

Test Plan: {F4921092}

Reviewers: epriestley

Reviewed By: epriestley

Subscribers: Korvin

Differential Revision: https://secure.phabricator.com/D17769