Allow Admins to remove the Login with buttons for OAuth services and still be able to import
This is a MR for Issue #13678 (closed)
With this feature Admins can disable GitHub OAuth for example from the admin area under Sign-in Restrictions.
These settings are saved into the disabled_oauth_sign_in_sources column of ApplicationSetting and used to either hide or show the OAuth provider on the Log In page.
/cc @DouweM