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 few//er//?

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