R1:7446402f921a

Differential Action List on Mobile

Summary: Make the actions appear in crumbs on mobile

Test Plan: Test action list on a mobile diff layout

Reviewers: btrahan, epriestley

Reviewed By: epriestley

Subscribers: epriestley, Korvin

Maniphest Tasks: T4730

Differential Revision: https://secure.phabricator.com/D8691