Make logged-out users use global settings, not default settings
Summary: Fixes T11917. Give logged-out / omnipotent users the global settings, not the default settings.
Test Plan: Changed applications and language, logged out, saw changes as a public user.
Reviewers: chad
Reviewed By: chad
Maniphest Tasks: T11917
Differential Revision: https://secure.phabricator.com/D16936