Issue #1919934 by larowlan: Change key of custom block vertical tabs to use 'advanced' instead of 'additional_settings()'.

Issue #1836008 by dawehner, Berdir, alexpott, katbailey, effulgentsia, EclipseGc: Fixed Remove drupal_classloader() use in Drupal\Core\AnnotatedClassDiscovery.

Issue #1924774 by amateescu, larowlan: Add a helper function for easier creation of a entity reference instance programatically.

Issue #1853086 by katbailey, msonnabaum, alexpott: Remove cache.page.enabled in favor of an explicit internal cache setting.

Issue #1068840 by sun, TR, Alan D., droplet, Damien Tournoud, tim.plunkett: Fixed core/includes/standard.inc contains inaccurate country data.

Issue #722650 by alexpott, tim.plunkett, arpeggio: Fixed Shortcut doesn't properly clean up or store menu links.

Issue #1880368 by stephen.colson, echoz, babbage: More comprehensive fix for form elements can break out of their bounding divs and whatnot.

Issue #1922034 by jthorson: Fixed UpgradePathTestBase does not detect 'An unrecoverable error has occurred' install errors.

Issue #1920686 by swentel: Fixed Deleting a menu gives fatal error + the delete button is shown on system menu's.

Issue #1899514 by sun, Dave Reid: Fixed ModuleHandlerInterface::getHookInfo should not be protected.

Issue #1904882 by balsama, YesCT: Entity reference field Reference method Default settings order should be Filter by then Sort by.

Issue #1928082 by vijaycs85, YesCT, alexpott: Fixed Make usage of book.settings:allowed_types() consistent.

Issue #1921996 by damiankloip, tim.plunkett, larowlan: Convert system_config_form() to implement FormInterface as a base class.

Issue #1920278 by dawehner, greggles: Indicate that "administer views" and "access all views" is kind of a big deal by making it "restrict access" -> true.