Issue #2942073 by effulgentsia, Sam152: Add a "bare.standard.php.gz" test fixture that starts from Drupal 8.4.0

Issue #2937483 by tim.plunkett, larowlan, EclipseGc, samuel.mortenson: Defining a new type of section storage relies on magic strings and hidden assumptions

This reverts commit c8dbe3a9.

Issue #2927344 by Wim Leers, xjm, TR, webchick, larowlan, David_Rothstein, catch, yoroy: Specifically warn about end dates for PHP support for old versions

Issue #2939208 by alexpott, tim.plunkett: Services registered with ContainerBuilder::setDefinition() are removed from container causing a BC break

Issue #2936642 by tim.plunkett: Getting runtime contexts will generate an E_WARNING for anonymous users

Issue #2938805 by markconroy, David_Rothstein, ckrina, Eli-T: Finalise the wording of the warning message on the status report page

Issue #2916084 by tim.plunkett, John Cook, andrewmacpherson, borisson_: Add John Cook as Batch API subsystem maintainer

Issue #2941582 by markconroy, Eli-T, smaz, ckrina, steveparks: Create a drupal.org documentation page for Umami profile to explain why it shouldn't be used in production sites

Issue #2941457 by agentrickard, tim.plunkett, hbensalem: EntityAdapter::getIterator requires undocumented methods

Issue #2775653 by dawehner, droplet, michielnugter, Lendude, jibran, alexpott, Mixologic, klausi, juampynr, cosmicdreams, cspitzlay, justafish, drpal, larowlan, claudiu.cristea, Berdir, Mile23, andypost, xjm, mtodor: JavascriptTests with webDriver

Issue #2914839 by Sam152: The current moderation state in the "meta" region on content entity forms is coupled to the moderation_state field widget

Issue #2939692 by Leksat, blazey, larowlan: menu_link_content_entity_predelete deletes "collection", "add-form", etc. links

Issue #2940204 by plach, Wim Leers, effulgentsia, matsbla, Gábor Hojtsy, tacituseu: Translatable fields with synchronization enabled should behave as untranslatable fields with respect to pending revisions

Issue #2941275 by zuhair_ak, joachim: improve the exception message for a missing source ID value in \Drupal\migrate\Row

Issue #2937945 by yo30, kim.pepper, dawehner, voleger, larowlan: Add messenger to ControllerBase and FormBase

Issue #2940108 by yo30, quietone, maxocub: getLegacyDrupalVersion() returns string not int as documented

Revert "Issue #2940204 by plach, Wim Leers, effulgentsia, matsbla: Translatable fields with synchronization enabled should behave as untranslatable fields with respect to pending revisions"

This reverts commit bbfa34e7.

Issue #2936714 by gabesullice, Wim Leers, amateescu, Sam152, Berdir: Entity type definitions cannot be set as 'internal'

Issue #2914484 by tim.plunkett, larowlan, xjm: Prevent the layout field from being removed if overrides exist

Issue #2940204 by plach, Wim Leers, effulgentsia, matsbla: Translatable fields with synchronization enabled should behave as untranslatable fields with respect to pending revisions

Issue #2941488 by larowlan, Eli-T: Add a .htaccess file to core/profiles/demo_umami/modules/demo_umami_content/default_content/images to prevent direct downloading of images

Issue #2938186 by navneet0693, John Cook, Eli-T, markconroy, smaz, ckrina, andrewmacpherson, larowlan: Set toolbar warning message to only appear on admin/edit pages

Issue #2938900 by David_Rothstein, navneet0693, JayKandari: Replace profile-defined blocks with custom blocks to fix a variety of problems

Issue #2938686 by Adam_Moulsdale, andrewmacpherson: Pink button/link style in Umami fails WCAG 2.0 SC 1.4.3 Contrast (minimum)

Issue #2927344 by Wim Leers, xjm, webchick, larowlan, catch, David_Rothstein, yoroy: Specifically warn about end dates for PHP support for old versions

Issue #2905098 by tedbow, Jo Fitzgerald, Wim Leers, MerryHamster, Yogesh Pawar, rajeshwari10, larowlan, xjm: Change block entity form handler from 'off_canvas' to 'settings_tray'

Issue #2659616 by Lendude, greggmarshall, katzilla, hexabinaer: Check field order and fix below/above in descriptions

Issue #2809491 by ApacheEx, dawehner, Lendude: Convert AJAX part of \Drupal\field\Tests\Boolean\BooleanFieldTest::testBooleanField to JavascriptTestBase

Issue #2843707 by Chirag_Garg, lokapujya, xjm, gerzenstl: Default config for entity displays does not match what is saved

Issue #2939802 by Wim Leers, cburschka: Follow-up for #2824851: EntityResourceTestBase::getModifiedEntityForPatchTesting() handles @FieldType=path incorrectly

Issue #2935783 by larowlan, Wim Leers: RequestHandler's handle method interacts with the Route object but should be able to just declare arguments