When following a link to a particular line ("/example.txt$12"), scroll to that line
Remove that snippet ("diffusion-jump-to") and add a more general-purpose snippet to SourceView.
This is a tiny bit hacky still (and probably doesn't work quite right with Quicksand) but gets things working again and works in all of Files, Paste, and Diffusion.
Test Plan: Followed links to particular lines in Paste, Files and Diffusion; got scrolled to the right place.
Reviewed By: amckinley
Maniphest Tasks: T13105
Differential Revision: https://secure.phabricator.com/D19350