Issue #1490402 by LewisNyman, nod_, mcjim, mdrummond, rteijeiro, jessebeach, Bojhan, ry5n: Redesign tabs and the content header.

Issue #2099741 by Wim Leers, wwalc, mr.baileys, eaton, dstol, nod_, effulgentsia: Protect WYSIWYG Editors from XSS Without Destroying User Data.

Issue #2187483 by Cottser, agentrickard, dawehner, jessebeach: Toolbar subtree is broken | JsonResponse->callback now returns data in an Insert Command without any support in ajax.js to eval the callback in the client.

Issue #2189453 by damiankloip, sun: Fatal error: Call to a member function hasPath() on a non-object in ViewListController::getDisplayPaths().

Issue #2157053 by alexpott, twistor, dawehner, sun: Ensure register_shutdown_function() works with php-fpm (blocks testbot php-fpm).

Revert "Issue #1926344 by jhodgdon, maggo, mdrummond, Cottser, dimboz | jenlampton: Consolidate search-result.html.twig and search-results.html.twig."

This reverts commit c83ff69e.

Issue #2177093 by sun, alexpott, InternetDevels, Xano: Remove 'access content' permission from all test module routes.

Issue #2100467 by amateescu, corvus_ch: Menu links are not ready to use a view builder so remove it from the annotation for now.

Issue #2187097 by dawehner, tim.plunkett: Add a request_stack service and use it for the http kernel.

Issue #2176265 by tim.plunkett, donquixote: Set an explicit ["config"]["autoloader-suffix"] in composer.json to avoid noise on composer update.

Issue #2067345 by Xano, jdillick, InternetDevels, bomoko | Berdir: Change EntityInterface type hints to NodeInterface where appropriate.

Issue #1967124 by damiankloip, dawehner | xjm: Bulk action views array to string conversion when there are no results.

Issue #2185843 by Cottser: Add joelpittet to the list of theme system maintainers in MAINTAINERS.txt.

Issue #2180627 by jessebeach, Wim Leers: Remove caption filter's caption-specific alignment classes.

Issue #1926344 by jhodgdon, maggo, mdrummond, Cottser, dimboz | jenlampton: Consolidate search-result.html.twig and search-results.html.twig.

Issue #2092343 by joelpittet, c4rl, Mark Carver: Consolidate forum.module and remove call to _theme_table_cell() within template_preprocess_forum_topic_list().

Issue #1939064 by joelpittet, pwieck, farrington, mark.labrecque, Cottser, InternetDevels, mdrummond, drupalninja99, BarisW, jenlampton: Convert theme_links() to Twig.

Issue #2152207 by steveoliver, joelpittet, gnuget, idflood, hussainweb, shanethehat, jenlampton, kpa, AnythonyR, EVIIILJ, kgoel, Cottser, dsdeiz, hanpersand: Convert theme_details() to Twig