Add an icon to aphlict connection status

Summary: A bit better styling, this adds an indication icon for if you're connected or not (and later, away, etc).

Test Plan: Test in Notifications menu, Conpherence full, Durable Column.

Reviewers: epriestley

Reviewed By: epriestley

Subscribers: Korvin

Differential Revision: https://secure.phabricator.com/D16647