Make jump nav use object name queries

Summary: Cleans up jump nav so it doesn't hard code a bunch of application behaviors. It still hard-codes a few, but fewer?

Test Plan: Jumped to stuff like D12, d, @dog, p admins only, etc.

Reviewers: btrahan

Reviewed By: btrahan

CC: aran

Differential Revision: https://secure.phabricator.com/D7196