Summary:
Adds a mail icon to use in the typeahead
Also, can we add a special class per obj-type? (May want to special color projects, etc) Will try to live without them.
Test Plan: photoshop
Reviewers: epriestley
Reviewed By: epriestley
CC: Korvin, epriestley, aran
Differential Revision: https://secure.phabricator.com/D8259
