(cherry picked from commit 1b186cf0)

Issue #2982149 by scuba_fly, vijaycs85, Lendude: Routing: Convert system functional tests to phpunit

(cherry picked from commit 3f77e728)

Issue #2809529 by Lendude, martin107: Convert AJAX part of \Drupal\system\Tests\Ajax\ElementValidationTest::testAjaxElementValidation to JavascriptTestBase

(cherry picked from commit ebee0dc2)

(cherry picked from commit bb9fb66d)

(cherry picked from commit 26624808)

Issue #2986735 by phenaproxima, Berdir, tim.plunkett, MegaChriz:  Drupal\Core\Plugin\Context\Context needs DependencySerializationTrait

(cherry picked from commit b1ad4a8d)

(cherry picked from commit 29155fdb)

Issue #2989627 by maxocub, quietone, masipila, phenaproxima, Gábor Hojtsy: d7_node_entity_translation migration is in the wrong module and is missing some mappings

(cherry picked from commit b4ece22a)

Issue #3001749 by quietone, Jo Fitzgerald, heddn, masipila, Gábor Hojtsy: Migrate D7 i18n custom blocks

(cherry picked from commit 9d7f684a)

Issue #2943899 by Sam152, amateescu, tstoeckler: Moderation state field cannot be updated via REST, because special handling in ModerationStateFieldItemList

(cherry picked from commit 1e5459eb)

Issue #2992817 by RoSk0, johndevman, phenaproxima, tim.plunkett, yanniboi, alexpott: Layout builder cron errors when no cleanup required

(cherry picked from commit 964372f5)

Issue #3004037 by jsacksick: ContentTranslationController::overview() should not construct URLs manually

(cherry picked from commit 6da082fe)

(cherry picked from commit 4af96a6a)

Issue #3002941 by tim.plunkett, tedbow: New enabled View modes for bundle have duplicate fields in layout

(cherry picked from commit 19513d5f)

(cherry picked from commit 7b001415)

Issue #3001979 by alexpott: \Drupal\Core\Config\FileStorage::getAllCollectionNames() should work when the directory does not exist

(cherry picked from commit de15d044)

Issue #2707879 by hctom, Sam152, grahl, reekris, casey, gngn, Noemi, dawehner, jherencia: Contextual Links do not respect pathPrefix

(cherry picked from commit 12c31093)

Issue #3004038 by jsacksick, tstoeckler: ContentTranslationRouteSubscriber should not construct its own URLs

(cherry picked from commit 6c19c087)

(cherry picked from commit 82d29a6c)

Issue #2896215 by tim.plunkett, borisson_, Anybody, tacituseu: Formatter settings lost when moving fields between regions in 'Manage display'

(cherry picked from commit 1f032717)

Issue #2961114 by quietone, heddn, Gábor Hojtsy, maxocub, masipila: Migrate D6 i18n CCK field option translations

(cherry picked from commit a007373c)

Issue #2938190 by smaz, markconroy, navneet0693, Gvert, John Cook, Adam_Moulsdale, sastha, Eli-T, Sutharsan, JayKandari, lauriii, xjm, larowlan: Create a favicon for Umami

(cherry picked from commit f3eabe43)

(cherry picked from commit ae75e875)

(cherry picked from commit 34800398)

Issue #2938743 by Manuel Garcia: Document #pattern property for email, password, tel, textfield, and url form elements

(cherry picked from commit 35a9a7c19b9ea248472a4d2cf893e03bae922b4d)

(cherry picked from commit 802d1e4f)

(cherry picked from commit 6e4b0af2)

(cherry picked from commit 3db26fd1)

(cherry picked from commit 8861a546)

Issue #2309731 by bendeguz.csirmaz, phenaproxima, alexpott: drupal_check_profile() does not invoke the profile's hook_requirements()

(cherry picked from commit 04a706f6)

(cherry picked from commit 7fcabc7a)

SA-CORE-2018-006 by alexpott, attilatilman, bkosborne, catch, bonus, Wim Leers, Sam152, Berdir, Damien Tournoud, Dave Reid, Kova101, David_Rothstein, dawehner, dsnopek, samuel.mortenson, stefan.r, tedbow, xjm, timmillwood, pwolanin, njbooher, dyates, effulgentsia, klausi, mlhess, larowlan

Issue #2990517 by tim.plunkett, alphex, xjm, phenaproxima, neclimdul: Adding a display mode to a content type using layout, and disabling layout on that new display mode removes the layout_builder__layout field and breaks layout in already configured display modes

(cherry picked from commit 2227375f)

(cherry picked from commit a324d5be)

(cherry picked from commit d9ccf86f)

Issue #2985907 by pasan.gamage, acbramley, dawehner, alexpott, DYdave: Add entity type into error description

(cherry picked from commit 7151900f)