Don't revert Conpherence page titles when updating notifications

Summary: Fixes T7709. JX.Title deals with adding (1), etc., counts, so send updates through it.

Test Plan: Clicked between some threads in Conpherence, no title flickering.

Reviewers: btrahan

Reviewed By: btrahan

Subscribers: epriestley

Maniphest Tasks: T7709

Differential Revision: https://secure.phabricator.com/D12260