Issue #2473301 by stefan.r, jcnventura, David_Rothstein, yannickoo: Raise MySQL requirement to 5.5.3

Issue #2473759 by tim.plunkett, Berdir, effulgentsia: Form caches should be deleted after submission

Revert "Issue #2395143 by amateescu, Fabianx, Berdir, beejeebus, dashaforbes, larowlan, dawehner, catch, alexpott, neclimdul, yched, znerol, fgm, effulgentsia: YAML parsing is very slow, cache it with FileCache"

This reverts commit 4192117d.

This reverts commit bfcb41bf.

This reverts commit a16cbda0.

Issue #2472669 by keopx, rpayanm, rteijeiro, jhodgdon: Complete documentation for every implementation of hook_ENTITY_TYPE_*

Issue #2462459 by Cinnead, Bojan Živkov, haasontwerp, emma.maria: Active trail menu items should be distinct from other items

Issue #2398445 by jp.stacey, LewisNyman, Manjit.Singh, pjbaert, emma.maria, ti2m: Clean up the "elements" component in Bartik

Issue #2346209 by keopx, Zekvyrin, subhojit777, cburschka, pguillard, dimaro, realityloop, m4olivei, joelpittet, rteijeiro, idebr: /filter/tips improperly escaped

Issue #2369675 by FMB, pstewart: Document that SearchQuery does not support orderBy in queries outside of addScore

Issue #2362637 by yched, slashrsm, rpayanm: Editor.js attach/detach doesn't pass context all the way down

Issue #1882788 by jabberwooki, keopx, joshi.rohit100, jhodgdon: assertText/assertNoText doesn't really show what you could see in the browser (bad docs)

Issue #2474121 by Wim Leers: CacheableMetadata should get BubbleableMetadata's merge/applyTo/createFromRenderArray/createFromObject methods

Issue #2349461 by Jelle_S, mdrummond, attiks, Wim Leers: Move fallback image style into the responsive image style entity

Issue #2474817 by znerol: DrupalKernel::classLoader not updated when switching to apcu either through settings.php or automatically

Issue #2409885 by nlisgo, tstoeckler, crasx, dmsmidt: Switch shortcut set form has accessibility issues

Issue #2389735 by lauriii, iMiksu, davidhernandez, larowlan, loopduplicate, LewisNyman, Wim Leers, dawehner, Cottser: Core and base theme CSS files in libraries override theme CSS files with the same name

Issue #2349503 by targoo, guntervs, tadityar, meramo, piyuesh23, janne.valtakari: Incorrect documentation about dates in node template

Issue #2455149 by k4v, jhodgdon, dawehner, Berdir: Aggregator xss fields should be using Field/Entity formatters

Issue #2473903 by mradcliffe: PostgreSQL: Fix entity_reference\Tests\Views\EntityReferenceRelationshipTest

Issue #2073075 by vanilla-bear, joshi.rohit100, swentel, marcingy, er.pushpinderrana, ACF, roderik: Don't call the t() function in OO code in the field_ui module

Issue #2381505 by dawehner, pwolanin, aspilicious, rteijeiro: Unserialize preloaded routes on the fly

Issue #2472043 by drumm, jcnventura: Canceling a user account, assigning content to Anonymous, should clear the comment name