R1:bc9291b32708

Fix Conpherence theme variables for both logged-out and logged-in users

Summary: Ref T12622.

Test Plan: As a logged-out and logged-in user, loaded Conpherence threads.

Reviewers: chad

Reviewed By: chad

Maniphest Tasks: T12622

Differential Revision: https://secure.phabricator.com/D17768