Issue #2253977 by martin107, Mixologic: Use ConfigFactoryInterface to type hint ConfigFactory, Part II.
Issue #2239065 by tim.plunkett | webchick: Overridden config bleeding through to configuration forms.
Issue #2098119 by beejeebus, alexpott, chx: Replace config context system with baked-in locale support and single-event based overrides.
Issue #2089627 by tim.plunkett: Move \Drupal\system\SystemConfigFormBase to \Drupal\Core\Form\ConfigFormBase.
Issue #2014013 by kgoel | DmitryDrozdik: Replace drupal_container() with Drupal::service() in the statistics module.
Issue #1998140 by dawehner, ParisLiakos, tim.plunkett: Remove backward compatible ControllerInterface.
