Issue #2016629 by larowlan, neclimdul, sun, alexpott, jibran, ParisLiakos, donquixote, effulgentsia, msonnabaum: Refactor bootstrap to better utilize the kernel.

This reverts commit 78d18c8d.

Issue #2274175 by tim.plunkett, vijaycs85: Block plugin schema should be defined separately from the entity.

Issue #2207377 by sun, xjm: Fixed Bogus "Enabled modules: ." assertions in test results when test enables no modules.

Issue #2247211 by blueminds, amateescu, xjm: Fixed Autocomplete widget doesn't work on entity labels without a " (entity_id)" suffix.

Issue #2103039 by fran seva, rodrigoaguilera, Gábor Hojtsy, ifrik, batigolix, bendev: Update hook_help for language module

Issue #2183231 by tstoeckler, plach, jessebeach, fago, Berdir, xjm, mauzeh: Make ContentEntityDatabaseStorage generate static database schemas for content entities.

Issue #2007248 by larowlan, tim.plunkett, xjm, Wim Leers: Fixed When CKEditor module is uninstalled, the right text editor config entities are affected but their labels are missing.

Issue #2272161 by tim.plunkett, fago: Entity-based conditions should use type => entity: instead of constraints.

Issue #2271967 by Jose Reyero, alexpott, amitgoyal: Fixed and use TypedConfigManagerInterface/TypedConfigManager.

Issue #2273489 by olli: Fixed Random test failure 'Created time is correct.' in GenericCacheBackendUnitTestBase/ApcuBackendUnitTest.

Issue #2181511 by amateescu, xjm, Berdir | yched: Throw an exception when creating an EntityDisplay for a non-ContentEntity.

Issue #1912536 by vollepeer, derheap | taslett: Remove all references to the (removed) user-picture.html.twig file.

Issue #2096699 by vijaycs85 | tstoeckler: Fixed Missing config schema for language.negotiation.selected_langcode.