Don't show an auth provider as enabled if it's still being created
Test Plan: attempted to create a new auth provider; observed that "enabled" ui element does not render. viewed existing auth provider and observed that "enabled" ui element still renders
Reviewers: #blessed_reviewers, epriestley
Reviewed By: #blessed_reviewers, epriestley
Subscribers: Korvin
Maniphest Tasks: T12245
Differential Revision: https://secure.phabricator.com/D17337