R1:5395a680f3b4

Remarkup and Action icons (plus retina)

Summary: New icons and retina versions

Test Plan: Photoshop

Reviewers: epriestley, vrana, btrahan

Reviewed By: epriestley

CC: aran, Korvin

Maniphest Tasks: T2013

Differential Revision: https://secure.phabricator.com/D3938