mastodon/app/controllers/settings/two_factor_authentication
ysksn b048926e67 Create Settings::BaseController ()
Define `Settings::BaseController#set_body_classes` so that sub classes
inherit `Settings::BaseController` don't need to define
`#set_body_classes` agein.
..
confirmations_controller.rb Create Settings::BaseController ()
recovery_codes_controller.rb Create Settings::BaseController ()