Issue #2238149 by Berdir, swentel: Apply formatters and widgets in EntityTestFormCotroller.
Issue #2098419 by larowlan | fago: Fixed Missing default access for all comment fields.
Issue #2325801 by jibran, larowlan: Abstract contact module mail delivery out of form into a service.
Issue #2228745 by Wim Leers, sqndr, nod_, undertext: Fixed Color module doesn't look for CSS files declared in a library.
Issue #2211633 by EclipseGc: Provide a composer.json file for Drupal\Component\Plugin.
Issue #2333395 by Jelle_S, attiks: Add sizes to template_preprocess_image.
Issue #1822048 by dawehner, tim.plunkett, damiankloip, EclipseGc, martin107, neclimdul: Introduce a generic fallback plugin mechanism.
Issue #2321809 by undertext, JeroenT | dawehner: Put the access manager onto \Drupal.
Issue #2338479 by rpayanm | dawehner: Convert \Drupal\views\Plugin\Derivative\ViewsMenuLink to use DeriverBase.
Issue #2339435 by YesCT, alexpott: Default no longer needs to be a property on Language or ConfigurableLanguage.
Issue #2336483 by er.pushpinderrana | tim.plunkett: Replace Views $form_state usage of '#page_title' with 'page_title'.
Issue #2336481 by er.pushpinderrana, ThomWilhelm | tim.plunkett: Replace Views usage of 'js settings' with 'js_settings'.
Issue #2250121 by mgifford, er.pushpinderrana, emma.maria, scresante, LewisNyman: Fixed Check for proper use of CSS Outline in Seven.
Issue #2333465 by marcvangend: Fixed Confusing exception message when Deriver plugin does not exist.
Issue #1860594 by penyaskito, damiankloip, xjm, alexpott, sun: Ensure that randomString() always returns a character that needs to be escaped for HTML.
Issue #2336355 by alexpott, Cottser: Fixed Refactor Attribute rendering so that class= is not printed.
Issue #2319487 by tim.plunkett, Cottser, larowlan: Remove ajax.inc.
Issue #2341701 by ParisLiakos: Provide an abstract logger.channel declaration.
Issue #2261425 by ParisLiakos, alexpott: Streamline aggregator's entities rendering with rest of core.
Issue #1342504 by jbrown, Jelle_S, Dave Reid: Support data URIs.