Issue #1825568 by alexpott, fago, Berdir: Fixed Random test failure in Drupal\system\Tests\Entity\EntityFormTest.

Issue #1817698 by andyceo: Move contextual links field handler out of views.views.inc and put it into contextual_links() module.

Issue #1815602 by jessebeach, attiks, Jelle_S, gmclelland, Wim Leers: Introduce a polyfill for matchMedia.

Issue #1716790 by attiks, sun, chx, mcjim: Fixed iOS 4 and Android 2.3 and below (webkit based browsers) return 'Unsupported Media Type' on XML in stock 8.x.

Issue #1714462 by n3or, sun, Gábor Hojtsy: Convert language negotiation settings to configuration system.

Messed up commit message. Let's try again.

This reverts commit 2784b6a8.

Issue #1824400 by gapple, katbailey: Rename the service tag 'kernel.event_subscriber()' to just 'event_subscriber()'.

Issue #1810880 by Albert Volkman, vijaycs85, barbun, alexpott: Convert update_last_check() and update_last_email_notification() variables to CMI system.

Issue #1691438 follow-up by Devin Carlson: Remove 8.x update function for {file_managed()}.filename should NOT be binary (and case-sensitive by default), which was added in 7.x.

Issue #1821906 by Wim Leers: Allow more Field API public API functions to act on a single field within an entity.

Issue #1272870 by mvc, mgifford, xjm, Drupali, Everett Zufelt: Fixed No semantics for nested comments / bad for screen-readers.

Issue #1708692 by xjm, effulgentsia, tim.plunkett, fubhy, Berdir, chx: Fixed Bundle services aren't available in the request that enables the module.

Issue #1821172 by spearhead93: Hash the config directory name, unhash the active and staging directory names.

Issue #843114 follow-up by Berdir, sun: Make tests for too many connections failure run on MySQL only.

Issue #1792844 by tim.plunkett: Change more public properties to protected in ViewExecutable and ViewStorage.

Issue #1810826 by dawehner, tim.plunkett, xjm, fastangel: Fixed Remove obsolete form code from views_ui()/admin.inc.

Issue #1798724 by andreiashu, Albert Volkman, alexpott: Convert drupal_js_cache_files() to State system.