R1:4189eb810b4c

Use violet with not-verified user tags

Summary: Will see how this goes in practice. Uses violet where color is used for non responsive peeps.

Test Plan: Create a user without email verification, test hover card, profile, mentions and lists.

Reviewers: epriestley

Reviewed By: epriestley

Subscribers: Korvin

Differential Revision: https://secure.phabricator.com/D17678