R1:2ecdbbec10bf

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