Update Config Application UI

Summary: Switches over to new property UI boxes, splits core and apps into separate pages. Move Versions into "All Settings". I think there is some docs I likely need to update here as well.

Test Plan: Click on each item in the sidebar, see new headers.

Reviewers: epriestley

Reviewed By: epriestley

Subscribers: Korvin

Differential Revision: https://secure.phabricator.com/D16429