Issue #1827448 by RobLoach, sun, jbrown, tstoeckler: Use __DIR__ instead of DRUPAL_ROOT where possible/sensible.

Issue #1938822 by sandhya.m, EllaTheHarpy, tim.plunkett, alexpott, YesCT: Convert update_status() to a new-style Controller.

Issue #1204784 by Kevin Morse, valthebald, druplet, kiamlaluno: Fix code comment in drupal_retrieve_form

Issue #1957042 by Kevin Morse, foopang, xjm, Fabianx, Cottser: Document why a method in CoreBundle is public static

Issue #1938670 by ParisLiakos, Xano, RobLoach, pp, alexpott: Convert unicode.inc to \Drupal\Component\Utility\Unicode.

Issue #1985386 by yched, Gábor Hojtsy: Crufty 'allowed_values_function_display()' ends up in list field stored config.

Issue #1987604 by Wim Leers: Contextual's use of Drupal.formatPlural() doesn't allow strings to be detected, and minor cleanup.

Issue #1549506 by swentel, pcambra, lbainbridge, muriqui: Fixed Edit and delete links should be hidden for locked fields.

Issue #1986888 by tim.plunkett, agentrickard: Fixed Field UI integration for entity types is brittle.

Issue #1987298 by tim.plunkett, quicksketch: Shorten directory structure and PSR-0 namespacing for plugins.

Issue #1983844 by tim.plunkett, dawehner: Add EntityListController and convert picture.module callbacks to routes/controllers to provide a use-case.

Issue #1987344 by tim.plunkett: NotFoundHttpException thrown in ParamConverterManager results in a WSOD.

Issue #1712250 by alexpott, n3or, cam8001, vijaycs85, Albert Volkman, jibran, heyrocker, chx: Convert theme settings to configuration system.

Issue #1977784 by YesCT, Gábor Hojtsy, EllaTheHarpy: Content language settings configuration page needs to determine what entities and bundles to include.

Issue #1898434 by gnuget, joelpittet, webthingee, -enzo-, Cottser: Remove theme_options_none(), use an alter hook instead for changing empty option label.

Issue #1982024 by Cottser, Fabianx: Lazy-load Attribute objects later in the rendering process only if needed.

Issue #1828616 follow-up by tstoeckler, Berdir: Allow AnnotatedClassDiscovery to find plugins in Drupal\Component as well.

Issue #1606362 by nod_, Angry Dan, seutje: Use throw when an ajax error occurs and extend JavaScript's Error object.

Issue #1981198 by yched: Change notice: More accurate names and form_ids() for Field UI form classes.