R1:26500f0545cc

Rename group icon for Projects

Summary: This should fa-users, not fa-group.

Test Plan: Open a Project that is set to "Group" aka "Users", set picture, see "Team" automatically.

Reviewers: epriestley

Reviewed By: epriestley

Subscribers: Korvin

Differential Revision: https://secure.phabricator.com/D15058