Issue #2240459 by Gábor Hojtsy, penyaskito | LoMo: Fixed Applying default language fallback rules to interface translation has impressively bad results.

Issue #2271529 by attiks, alexpott, Lowell, YesCT, Jelle_S | mdrummond: Move breakpoint settings to theme and module *.breakpoints.yml files at root level.

Issue #2309715 by Gábor Hojtsy: Fixed Several views still say they depend on block module but not anymore.

Issue #2309323 by Berdir, tim.plunkett: Allow #submit and #validate to be specified as methods of the form object.

Issue #1837388 by tim.plunkett, dawehner, Wim Leers: Provide a ParamConverter than can upcast any entity.

Issue #2251113 by alexpott, damiankloip, Crell, Wim Leers, dawehner, sun: Use container parameters instead of settings.

Issue #1510544 by swentel, Bojhan, Gábor Hojtsy, merlinofchaos, Cottser, Wim Leers, plopesc, aspilicious, sannejanssen,  larowlan, tim.plunkett, nod_: Fixed Show previews in front-end theme, able to select different view modes.

Issue #2212427 by Mixologic, YesCT, Sutharsan, mgriego, icseh., visabhishek, znerol: Use interface instead of class name for language manager where appropriate.

Issue #2318297 by fietserwin: Rotate effect: do not use html entity for 'degree' but its unicode character.

Issue #1976158 by Berdir | msonnabaum: Rename entity storage/list/form/render "controllers" to handlers.

Issue #2318817 by alimac, martin107: Remove method setId() from core/lib/Drupal/Core/Language/LanguageInterface.

Issue #2324783 by JayeshSolanki | andypost: Fixed CommentLinkBuilderTest::setUp() should be protected.

Issue #2322809 by chx, dawehner, tim.plunkett: Tighten routing security by access checking in matchRequest.

Issue #2321341 by blueminds: Fixed EntityAccessControlHandler::createAccess() does not pass into the hooks the entity bundle.

Issue #2318847 by tstoeckler: Fixed ExtensionDiscovery does not allow the value of the "type" key to be wrapped in quotes.

Issue #2271251 by ParisLiakos, undertext, JeroenT, StevenPatz, tim.plunkett: Remove usages of watchdog() from non-form and non-controllers.

Issue #2250243 by dawehner, sun: Remove needless ContainerAware dependency from AuthenticationManager.

Issue #2319719 by Tim Bozeman, pcambra, undertext, bojanz: Fixed Widget validation crashes on ItemList violations.

Issue #1987882 by disasm, vijaycs85, penyaskito, kim.pepper, likin, YesCT, InternetDevels, dawehner, wamilton, Letharion, katbailey, googletorp, tim.plunkett, acrollet, neetu morwani: Convert content_translation routes to a new style controller.