Moved Version Footer from Footer to /config/all

Summary: Fixed T2349

Test Plan:
Could not visibly see version at footer any more. Appeared in the top of /config.
Does not appear as a config option in /config.

Reviewers: epriestley

CC: aran, Korvin

Maniphest Tasks: T2349

Differential Revision: https://secure.phabricator.com/D4539