Auto-shorten Phabricator links

Discourse has an inline onebox feature where you paste a link and it’s replaced by a nice name (you can see it by pasting a link to another Discourse topic, for example). It would be nice to have that for Phabricator as well: when I paste it should just show T123.


Yes, it would be nice.
Or, it has been.
Which is probably a demonstration of lingering open requests already implemented, somehow.

or not.