Issue #3040210 by Spokje, phenaproxima, shaal, lauriii, hctom, a.dmitriiev, xjm, cilefen, eelkeblok: Updating twig/twig to v1.38.2 (included in Drupal 8.6.11) causes fatal error when embed tags are used in templates

(cherry picked from commit 7e18d45e)

This reverts commit 34845b8a.

Revert "Issue #3039572 by Lendude, Mile23: Prevent tests with multiple groups running multiple times"

This reverts commit 8d4e3ec3.

Revert "Issue #3026434 by tedbow, tim.plunkett, xjm, phenaproxima, plach, Kristen Pol, alexpott: Ensure that Layout Builder Inline Blocks doesn't assume section storage internals"

This reverts commit 6a6516ab.

(cherry picked from commit be9af5bd)

Issue #3026434 by tedbow, tim.plunkett, xjm, phenaproxima, plach, Kristen Pol, alexpott: Ensure that Layout Builder Inline Blocks doesn't assume section storage internals

(cherry picked from commit 09a6d81ec9dd5822d4798f2343704fb72f4c865d)

(cherry picked from commit c73c8944)

Issue #3037970 by Berdir, Baysaa: Custom serialized field's data should be normalized even if it's empty

(cherry picked from commit 1506b0af)

Issue #3039408 by vijaycs85, WidgetsBurritos, alexpott, phenaproxima, Joseph Zhao, tstoeckler, kfritsche, mikelutz, fabpot: Updating twig/twig to v1.38.0 or v1.38.1 causes fatal error

(cherry picked from commit 82fed915)

(cherry picked from commit 5b3b69f7)

Issue #3035316 by seanB, andrewmacpherson, oknate, phenaproxima, rainbreaw: ‘Add media’ in MediaLibraryWidget should be a button, not a link

(cherry picked from commit 05fa2182)

Issue #2880149 by amateescu, timmillwood, Manuel Garcia, Jo Fitzgerald, fidodido06, plach, blazey, hchonov, benjifisher, lbodiguel, vpeltot, larowlan, dixon_, jojototh, Wim Leers, catch, jibran, Berdir, mikelutz, pameeela, webchick, Bojhan: Convert taxonomy terms to be revisionable

Issue #2296615 by Mile23, chr.fritsch, jibran, borisson_, dawehner, alexpott, andypost: Accurately support multiple @groups per test class

(cherry picked from commit 2af907ca)

(cherry picked from commit 165ba7ec)

Issue #3032287 by Sam152, tim.plunkett, amateescu: Add the content moderation state widget to the layout builder entity form

(cherry picked from commit d4f1cb5a)

Issue #2880152 by amateescu, blazey, plach, larowlan, vijaycs85: Convert custom menu links to be revisionable

(cherry picked from commit 5ad8f598)

Revert "Issue #3035316 by seanB, andrewmacpherson, oknate, phenaproxima, rainbreaw: ‘Add media’ in MediaLibraryWidget should be a button, not a link"

This reverts commit 379e676d.

Issue #3035316 by seanB, andrewmacpherson, oknate, phenaproxima, rainbreaw: ‘Add media’ in MediaLibraryWidget should be a button, not a link

(cherry picked from commit 58d6b442)

Issue #2978283 by Lendude, VladimirAus, interX, kim.pepper, alexpott, LOBsTerr: Creating a view with revisions triggers Drupal\Component\Plugin\Exception\PluginNotFoundException: The "" plugin does not exist

(cherry picked from commit 2b5a0b53)

Issue #3038892 by alexpott, quietone: Drupal\Tests\migrate_drupal\Kernel\d6\FieldDiscoveryTest randomly fails on PostgreSQL

(cherry picked from commit 6896b4eb)

Issue #2969109 by martin107, andypost, kaythay, Berdir: Replace deprecated usages of entityManager in form classes

(cherry picked from commit 2c166a50)

Issue #3038707 by amateescu: The entity type definition is out of sync between SqlContentEntityStorage and SqlContentEntityStorageSchema during field storage CRUD operations

(cherry picked from commit 7d2d9cca)

Issue #3016420 by tim.plunkett, EclipseGc: Allow context definition annotations to specify constraints

(cherry picked from commit 3072b3587d63b1dd7bc294db557d74e803c8b3da)

Issue #3038538 by smaz, kjay, markconroy, Dries: Complete 'Out of the box initiative' and add 'Umami demo' subsystem maintainers

(cherry picked from commit 4b2c32c4)

Issue #3034751 by shaal, goska_m, pawandubey, andrewmacpherson: Remove link from node title in Card display mode to improve accessibility

(cherry picked from commit 390ffde1)

Issue #2976035 by amateescu, blazey, hchonov, plach, tstoeckler, catch, jibran, larowlan, alexpott: Entity type CRUD operations must use the last installed entity type and field storage definitions

Issue #3038062 by Gábor Hojtsy, alexpott: [Symfony 4] Skip ReverseProxyMiddlewareTest::testReverseProxyEnabledLegacy test

Issue #2788637 by mglaman, Berdir, bradjones1, effulgentsia, alexpott, amateescu, borisson_: Values in shared table for SQL content entity storage do not get unserialized

(cherry picked from commit 54ff737a)

(cherry picked from commit c51bacbc)

Issue #2949715 by jhodgdon, ankitjain28may, Lendude, mohit1604, dww, alexpott: Automated Tests 8.x topic needs an update

(cherry picked from commit 446586b6)

Issue #3016429 by bircher, mpotter, alexpott, johndevman, borisson_, Upchuk, larowlan: Add a config storage copy utility trait and fix ConfigManager::createSnapshot

(cherry picked from commit 21c35049)

Issue #2951550 by mikelutz, Jo Fitzgerald, quietone, heddn, alexpott, phenaproxima: Make service for field discovery for use in migrate entity derivers

(cherry picked from commit a916e4d4)

Issue #2940135 by andypost, Berdir, alexpott: Use file_system service to \Drupal\Core\Config\FileStorage

(cherry picked from commit 2348afa4)

Issue #2937542 by alexpott, mikelutz, larowlan, dawehner, Mile23, catch, Gábor Hojtsy, Chi: Not setting the strict option of the Choice constraint to true is deprecated since Symfony 3.4 and will throw an exception in 4.0

Issue #3029839 by shaal, smaz, Gábor Hojtsy, mcannon, Eli-T, alexpott: Multilingual functionality - enable English and Spanish as part of Umami installation

(cherry picked from commit afbdd37f)

(cherry picked from commit 61a86b38)

Issue #2809503 by Lendude, markdorison, voleger, andypost, jibran, alexpott, Mixologic, mondrake: Convert AJAX part of \Drupal\file\Tests\FileFieldWidgetTest to JavascriptTestBase

Issue #3021450 by kim.pepper, jibran, voleger, alexpott, Berdir: Add @trigger_error to deprecated functions in file.inc and replace their usages

Revert "Issue #2135445 by dww, Sam152, jessebeach, Mile23, Kristen Pol, Wim Leers, larowlan: Toolbar displays Manage tab even if the user is not permitted to see it"

This reverts commit 211c6641.