R1:db65f828ee69

Fix $classes not imploding properly in list view

Summary: Fixes the persistent chat hyperlinks showing.

Test Plan: Open persistent chat, no longer see the hyperlinks showing. Close and open chat. Edit room.

Reviewers: epriestley

Reviewed By: epriestley

Subscribers: Korvin

Differential Revision: https://secure.phabricator.com/D17216