R1:2383e741aa74

Add user icons / colors for subscriber transactions

Summary: Adds additional icon states for subscriber transactions. Also updated "eraser" to "trash" (man that icon is bad).

Test Plan: add a subscriber, remove a subscriber.

Reviewers: epriestley

Reviewed By: epriestley

Subscribers: Korvin

Differential Revision: https://secure.phabricator.com/D13800