R1:0c37f8db4b82

Make settings a wrench, not a cog

Summary: Change icon for Settings app to more match previous. Also align plus icon a little better.

Test Plan: Lots of staring.

Reviewers: epriestley

Reviewed By: epriestley

Subscribers: Korvin, epriestley

Differential Revision: https://secure.phabricator.com/D10934