Issue #2333357 by tstoeckler, benjy: Fixed Migrate node_revisions.timestamp into the revision_timestamp field.

Issue #2327363 by yched, andypost: Move datetime_datetime_widget_validate() to DateTimeDefaultWidget::massageFormValues().

Issue #2336405 by tim.plunkett: Fixed Follow-up: FormStateInterface::getGroups() should return by reference.

Issue #2323921 by Michael Hodge Jr | jhodgdon: Fixed Add user page (admin/people/create) remembers values and should not.

Issue #2283675 by er.pushpinderrana, amitgoyal, mparker17, joachim, mmarquez: Document how optgroups are generated in form_select_options()

Issue #2334405 by almaudoh, drunken monkey: Clean up documentation links to functions moved to render element classes

Issue #2318281 by tim.plunkett, dawehner | kim.pepper: Provide a standard way to check a plugin is an instance of the required interface.

Issue #1530774 by lokapujya, jenlampton, Cottser, svdhout, alexrayu, hpz: Fixed Test coverage for adding classes into region template.

Issue #2107427 by penyaskito, dclavain, Gábor Hojtsy, mashermike, Aron Novak, YesCT, szato, Wim Leers, mikispeed, vijaycs85: Fixed Regression: Language names should display in their native names in the language switcher block.

Issue #2329775 by lauriii | davidhernandez: Move taxonomy term classes from preprocess to templates.

Issue #2332427 by neclimdul: Fixed APCUBackend makes incorrect assumptions about apc_fetch return type.

Issue #2333987 by herom: Fixed schema translation context terminology and add context for date_format configuration.

Issue #2320157 by moshe weitzman, Wim Leers, penyaskito, tim.plunkett: Generate placeholder content for Field types.

Issue #2329485 by damiankloip, dawehner: Allow permissions.yml files to declare 'permission_callbacks' for dynamic permissions.

Issue #2256257 by znerol, cosmicdreams | YesCT: Move token seed in SessionManager in isSessionObsolete() and regenerate()  to the MetadataBag.

Issue #2110345 by mr.york, effulgentsia, Désiré, fgm, fago, pfrenssen, stefan.r, Berdir, Rajendar Reddy: Simplify validation constraint implementations for fields.

Issue #2307533 by sqndr, LewisNyman, kenyob, emma.maria | tkoleary: Fixed Insufficient space at page bottom.

Issue #2330251 by seiplax: Fixed Enable/disable module/extension checkbox does not get needed margin.

Issue #1898478 by joelpittet, Cottser, lokapujya, m1r1k, jstoller, er.pushpinderrana, duellj, organicwire, jessebeach, idflood, Jalandhar, Risse, derheap, galooph, mike.roberts, tlattimore, nadavoid, LinL, steveoliver, chakrapani, likin, killerpoke, EVIIILJ, vlad.dancer, podarok, m86 | c4rl: Menu.inc - Convert theme_ functions to Twig.

Issue #375062 followup by David_Rothstein: Fixed [follow-up] imagecolorsforindex() Color index nnn out of range in GDToolkit.

Issue #2321745 by larowlan, tim.plunkett: Add #type => 'path' that accepts path but optionally stores URL object or route name and parameters.

Issue #2154775 by yvesvanlaer, er.pushpinderrana, kirkkala, barnettech, InternetDevels | Wim Leers: Fixed In-place editing of title: works, but cursor is invisible.