Add the Jxxx Monogram to Phame Post Tab Titles for logged-in users

Summary:
This revision brings Phame Posts inline with other objects like Tasks, Revisions, Passphrase, etc. which all place the Monogram into the browser tab title

This improves useability of Phame Posts by making it easier to reference them in other parts of Phorge

Old Look
{F22364 size=full}

New Look
{F22365 size=full}

Test Plan:
Made a post, be logged-in, saw the Monogram in the title (as usual in other apps like Maniphest).

See same post as logged-out (or be a search engine), saw just the title (so your SEO consultant is still happy).

Reviewers: O1 Blessed Committers, valerio.bozzolan

Reviewed By: O1 Blessed Committers, valerio.bozzolan

Subscribers: Cigaryno, bekay, speck, tobiaswiese, valerio.bozzolan

Tags: #phame

Maniphest Tasks: T15050

Differential Revision: https://we.phorge.it/D25022