Issue #3037823 by alexpott, Berdir, amateescu: The system.theme.data key remains corrupted in state causing performance issues and is not used in >= 8.7

Issue #2929783 by tim.plunkett, MerryHamster, bnjmnm, xjm, webchick, samuel.mortenson, EclipseGc, kevincrafts, ndf, DyanneNova, yoroy, TheodorosPloumis, tedbow, pixelite, seanB, phenaproxima, AaronMcHale, benjifisher: Review Layout Builder UI terminology

Issue #2938182 by bnjmnm, phenaproxima, DyanneNova, webchick, andrewmacpherson, xjm, tedbow, benjifisher: Design intuitive affordances for Layout Builder (for illustrating which parts of the page are editable in a given context)

Issue #3037113 by tim.plunkett, andrewmacpherson: Replace layout builder discard-changes + revert-to-default links with buttons

Issue #2942907 by plach, amateescu, Berdir, tim.plunkett, hchonov, gabesullice, jibran, xjm, tedbow, timmillwood, larowlan, Sam152, pmelab, catch, effulgentsia: Entity system does not provide an API for retrieving an entity variant that is safe for editing

Issue #3029197 by catch, Gábor Hojtsy, alexpott, mikelutz: [symfony 5] Class implements "Symfony\Component\DependencyInjection\ResettableContainerInterface" that is deprecated since Symfony 4.2, use "Symfony\Contracts\Service\ResetInterface" instead

Issue #3037124 followup by tim.plunkett, xjm: Off-canvas dialog titles should not be visually truncated by the library CSS either

Issue #3037124 by bnjmnm, andrewmacpherson: Off-canvas dialog titles should not be visually truncated

Issue #2989541 by shaal, kjay, smaz, rachel_norfolk, finnsky, markconroy, Eli-T, JayKandari, redzeuf: Consider use of Tour module in Umami

Issue #2999731 by tim.plunkett, r.aubin, bnjmnm, tedbow: Document Layout Builder functionality in its hook_help() text

Issue #3037766 by seanB, phenaproxima, Gábor Hojtsy: Inconsistent margin/padding on media library vertical tabs

Issue #2981044 by seanB, lauriii, andrewmacpherson, phenaproxima, dww, larowlan, marcoscano: Unify the grid/table views of the media library

Issue #2947517 by Lendude, jibran, alexpott, larowlan: Selenium driver: API to get remote file paths

Issue #2996404 by andrewmacpherson, Krzysztof Domański: Replace old keypress workaround in AjaxFormImageButtonTest

Issue #3028627 by Eli-T, rakesh.gectcr, shaal, smaz, Gábor Hojtsy, kjay: Restructure Umami's default content files so more than one language can be included

Issue #2808163 by amateescu, samuel.mortenson, dawehner: Support dynamic entity types in the EntityRevisionParamConverter

Issue #3026588 by alexpott, plach, jibran, Berdir, larowlan, Sam152, Pancho, hussainweb et al: Move ArchiveTar to composer

Issue #3035361 by claudiu.cristea: Remove usages of drupal_static() & drupal_static_reset() from file_test.module

Issue #3028671 by Berdir: Add @trigger_error() to deprecated and already (almost) unused EntityManager methods

Issue #3037218 by kim.pepper, dww, Mile23:  run-tests.sh with --browser throws error Class 'FileSystemInterface' not found

Issue #2999723 by hiway, pawandubey, shaal, kjay, MaddieC, lauriii: Umami's card layout broken in IE11

Issue #3030944 by shaal, tonypaulbarker, Eli-T, markconroy, rachel_norfolk: Umami Copyright year in disclaimer block needs to be set to the current year at install time

Issue #3035825 by plach, larowlan, amateescu, jhedstrom: Make it easier to set up the current_user service in kernel tests

Issue #3035552 by pfrenssen, angel.h: $libraries variable declared twice in LibraryDiscoveryParser::buildByExtension()

Issue #3035345 by claudiu.cristea: Remove usage of drupal_static_reset() from ContentTranslationOperationsTest

Issue #3035347 by claudiu.cristea: Remove usage of drupal_static_reset() from ContentTranslationTestBase

Issue #3035349 by claudiu.cristea: Remove usage of drupal_static_reset() from EntityReferenceFieldTranslatedReferenceViewTest

Issue #3033317 by Gábor Hojtsy: AccountProxy initialAccountId and ViewKernelTestBase will only be removed in Drupal 9.0.0, fix deprecation messages

Issue #3000057 by kim.pepper, andypost, claudiu.cristea, voleger, dww, Berdir, larowlan: Deprecate drupal_set_time_limit() and file_upload_max_size() and move to Environment component

Issue #3030647 by tim.plunkett, phenaproxima, xjm, DyanneNova, bnjmnm, tedbow, dead_arm: Do not add a section when editing an empty layout, or differentiate between new layouts and existing empty layouts

Issue #3034913 by govind.maloo, wombatbuddy: Written 'Confuration' instead of 'Configuration' in the 'Typed Data API' article

Issue #2989503 by seanB, phenaproxima, samuel.mortenson, amateescu, Wim Leers: Add tests to prove that the media library widget works when target_bundles is NULL