Issue #2912169 by alexpott, tobiberlin, Berdir, dawehner, grahamC: Inject the argument resolver into HttpKernel::__construct

Issue #2665992 by alexpott, klausi, heykarthikwithu, xjm, tstoeckler: @file is not required for classes, interfaces and traits

Issue #2399219 by amateescu: Allow entity form handlers to determine the entity object they need to work with

Issue #2368275 by martin107, dawehner, znerol, Crell, Wim Leers: EntityRouteEnhancer and ContentFormControllerSubscriber implicitly depend on too many services

Issue #2335659 by tim.plunkett, dawehner, effulgentsia, sun: Remove FormState ArrayAccess usage from core.

Issue #2165475 by damiankloip, dawehner, martin107, tim.plunkett, jibran, xjm, Jalandhar: Provide a generic class resolver.

Issue #2190643 by Berdir, amateescu, Xano, yched: Serializing the container is a very very bad idea, let's prevent it?.

Issue #2068471 by dawehner, Crell, tim.plunkett, jibran, fubhy, larowlan: Normalize Controller/View-listener behavior with a Page object.