Begin modularizing profile panel/link construction
Summary: Ref T10054. This has no product impact, but prepares us for customizable side nav on "profiles" (today, projects; probably users some day; and maybe other stuff down the road).
Test Plan: Clicked all links on a profile, everything was exactly the same as before.
Reviewers: chad
Reviewed By: chad
Maniphest Tasks: T10054
Differential Revision: https://secure.phabricator.com/D15007