Issue #2118703 by Wim Leers, amateescu: Introduce #post_render_cache callback to allow for personalization without breaking the render cache.

Issue #2093167 by johnnydarkko, thedavidmeister, Vibjerg: Deprecate check_plain(), call \Drupal\Component\Utility\String::checkPlain() directly instead.

Issue #1952394 by vijaycs85, tstoeckler, webflo, Gábor Hojtsy, Schnitzel, falcon03, YesCT, kfritsche, Ryan Weal, dagmita, likin, toddtomlinson, nonsie, Kristen Pol, dawehner, tim.plunkett, penyaskito, EclipseGC, larowlan, robertdbailey, helenkim, David Hernández, EllaTheHarpy, lazysoundsystem, juanolalla, R.Hendel, Kartagis: Add configuration translation user interface module.

Issue #1886448 by dawehner, sun, Berdir, ParisLiakos: Rewrite the theme registry into a proper service.

Issue #2073531 by tim.plunkett, dawehner, Berdir, catch, plach: Use current user service instead of _account, remove _account from the request object.

Issue #2133469 by tim.plunkett, damiankloip, dawehner: Replace path-based entity links with route names.

Issue #2101427 by David_Rothstein, evilehk, nod_: Follow-up: Browser validation error with Chrome on hidden required fields, even on forms that don't allow client-side validation.

Issue #2020111 by damiankloip, a_c_m, dawehner, tim.plunkett: Allow the "With selection" label on bulk operation to be configured.

Issue #2133897 by Wim Leers: Clean up Edit: don't pass AJAX URLs from the server to the client through drupalSettings, use Drupal.url() instead.

Issue #2133907 by Wim Leers: Clean up Edit's in-place editors: consistent naming, library naming and file naming.

Issue #1956448 by benjy, tim.plunkett, ed.hollinghurst, YesCT: Use the block instance title on the block admin listing.

Issue #2085201 by jessebeach, tim.plunkett, dawehner, yoroy: Use sensible block categories (rather than module-name categories).

Issue #2121461 by Xano: \Drupal\Core\EventSubscriber\ViewSubscriber::onHtml() does not allow controllers to return string content.

Issue #1912806 by dcrocks, marthinal, jthorson, amateescu, julien, sun: Regression: 'User Account' displayed on front page for anonymous users.

Issue #1959338 by superspring, urwen, tim.plunkett, damiankloip: Reroll: Remove PHP4-style references for objects.

Issue #2119471 by Xano, swentel, amateescu: FieldInterface::getBundles() no longer needs to be nested.