Issue #2402061 by emma.maria, Katiemouse, er.pushpinderrana: Reusable heading classes should be "heading-*" not "header-*"

Issue #2227121 by emma.maria, Vally79, DickJohnson, Jill L, frankfarm, rootwork, jamesquinton, Rajendar Reddy, krueschi, ericxb, seiplax, bluegriff: The "Default country" dropdown element overflows the installer container at certain widths

Issue #2410539 by cafuego, jibran, larowlan: Views schema prevents saving of view with disabled display through code

Issue #2415399 by lokapujya, ultimike: D6->D8 migration: User role based block visibility settings not migrated properly

Issue #2402639 by Katiemouse, nitvirus, lakshminp, dernetzjaeger, emma.maria, gippy, kporras07, john guant, Prashant.c: Rename the footer regions in Bartik

Issue #2349517 by emma.maria, b0unty, idebr, tarekdj, lauriii, Manjit.Singh, adci_contributor: Fix RTL for Bartik's vertical tabs

Issue #2375997 by Mile23, hussainweb, tstoeckler, omers: Avoid tying Drupal 8's composer.json to specific package commits

Issue #2165989 by Xano, pcambra, damiankloip, dawehner: Add a Views field handler for multiple entity operations

Issue #2400233 by emma.maria, rpayanm, Katiemouse, LewisNyman: Add reusable heading classes to Bartik

Issue #2358079 by pwolanin, Berdir: Require a specific placeholder format in db_query() in order to trigger argument expansion, and require explicit 'IN' parameter for conditions

Issue #2360175 by zaporylie, gaurav.goyal, droplet, sivaji@knackforge.com, mcdruid, nod_, er.pushpinderrana, brahmjeet789: Change .append(' ') with CSS style in system.admin.css

Issue #2417645 by tim.plunkett, effulgentsia, pwolanin: Change destination query string handling to break dependence on system path

Issue #2418613 by pwolanin: Fix #0 bug in toUriString() method in Url class, clarify toString() vs toUriString()

Issue #2417705 by idebr: Autocomplete suggestions visual regression after modal and jQuery UI update

Issue #2418117 by yched: MenuLinkContent::baseFieldDefinitions() wrongly passes default values as a field setting

Issue #2416987 by YesCT, amateescu, webchick, Wim Leers, yched: Fix UI regression in the menu link form

Issue #2414953 by alexpott: Element uses \Drupal::service() as a service locator and prevents injecting a custom typed config manager in config

Issue #2415855 by emma.maria: A forgotten reference to list.css in Bartik's info file is giving core a 404 error

Issue #552478 by markcarver, sun, effulgentsia, jhedstrom, ohnobinki: Restrict "self-closing" tags to only void elements in drupal_pre_render_html_tag

Issue #2405091 by marthinal, Berdir, RavindraSingh: Cannot create user entities  - {"error":"Access denied on creating field pass"}

Issue #2133471 by lokapujya, Lendude, jhedstrom, tadityar, webflo, whitelikeman: Notice: Undefined index: uid in simple a user view