R1:d9adedd9d64d

Conpherence - smooth out user interaction switching threads in the durable column

Summary: Ref T7014. This changes the title and selected icon right as the user clicks it. This could //maybe// be in the "willLoadThread" callback hook, but it doesn't happen every time we load a thread, just **this** time so keep it right in the listener for now.

Test Plan: switched some threads and liked what I saw

Reviewers: epriestley, chad

Subscribers: Korvin, epriestley

Maniphest Tasks: T7014

Differential Revision…