Provide a Drydock "Console" controller

Summary:
Ref T2015. After introducing ApplicationSearch, the left nav turned into a soupy mess. Split the major sections into four separate areas, and unify them with a simple console.

This also reverts all the prefix stuff, since the results were awful and I don't anticipate it ever being the best solution to any UX problem.

Test Plan:
Browsed blueprints, resources, leases and logs.

Here's the new console:

{F93279}

Reviewers: btrahan

Reviewed By: btrahan

CC: aran

Maniphest Tasks: T2015

Differential Revision: https://secure.phabricator.com/D7833