Issue #2267551 followup by jfhovinne: [meta] Deal with PHP requirement vs. Debian PHP version numbering.

Issue #2364171 by Gábor Hojtsy, penyaskito: Fixed Enabling and configuring content language negotiation does not work at once.

Issue #2368443 by amateescu: Use the new FallbackPluginManagerInterface in ER's selection plugin manager.

Issue #2268753 by amateescu, larowlan, mikemiles86: Fixed Cleanup EntityReferenceController's create() method.

Issue #2358999 by rpayanm, JeroenT, er.pushpinderrana, javivf, Ec1ipsis, aczietlow | Les Lim: Remove usage of drupal_html_to_text().

Issue #2364343 by ksenzee | corbacho: Fixed robots.txt to allow Google access to CSS and JavaScript files.

Temporary revert; CMF 1.3 is also ready and is a bigger PITA to re-roll.

This reverts commit d806a9bb.

Issue #2368739 by Wim Leers: Fixed user_page_attachments() unnecessarily adds an individual CSS file on every page.

Issue #1938918 by joelpittet, lauriii, botanic_spark, mdrummond, nielsonm: Convert menu theme tables to table #type.

Issue #2367285 by cilefen: Fixed Function doc typo for hook_page_attachments_alter() in theme.api.php.

Issue #2368185 by Gábor Hojtsy: Fixed Content views shipped by node module have non-functional timestamp field.

Issue #2367557 by mpdonadio: Fixed Update TestKernel to match class loader changes in Drupal Kernel.

Issue #1879930 by fran seva, Gábor Hojtsy, martin107, markie, Schnitzel, alexpott, Sutharsan, mon_franco, YesCT, spearhead93, herom, Désiré: Fixed Language selectors are not showing localized to the page language.

This reverts commit 39aeee85.

Issue #2282673 by stevepurkiss, ParisLiakos, mgifford: Add a PHPunit test for not using Drupal\Core code in Drupal\Component.

Issue #1833076 by herom, alansaviolobo, Pancho, pixelite, jessehs, YesCT: Expand translation settings when editing outdated translation so remember to uncheck "needs updating".

Issue #2367661 by swentel: Fixed Follow up: ThirdPartySettingsTraitInterface missing getThirdPartySettings() method.

Issue #2367665 by amateescu: Add primary actions on the 'Field storage settings' and 'Field settings' forms.

Issue #2349373 by stefika, skippednote: Fixed Menu label overlaps with the dropdown trigger on narrow screens on RTL.