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 #1530774 by lokapujya, jenlampton, Cottser, svdhout, alexrayu, hpz: Fixed Test coverage for adding classes into region template.
Issue #2318281 by tim.plunkett, dawehner | kim.pepper: Provide a standard way to check a plugin is an instance of the required interface.
Issue #2334405 by almaudoh, drunken monkey: Clean up documentation links to functions moved to render element classes
Issue #2283675 by er.pushpinderrana, amitgoyal, mparker17, joachim, mmarquez: Document how optgroups are generated in form_select_options()
Issue #2323921 by Michael Hodge Jr | jhodgdon: Fixed Add user page (admin/people/create) remembers values and should not.
Issue #2331019 by slashrsm: Implement ThirdPartySettingsInterface in Vocabulary.
Issue #2336405 by tim.plunkett: Fixed Follow-up: FormStateInterface::getGroups() should return by reference.
Issue #2123225 by Jelle_S, attiks, Risse, bradklaver | Wim Leers: Fixed Do not upscale by default.
Issue #2332983 by dawehner: Replace ban event subscriber with a ban stack.
Issue #2327363 by yched, andypost: Move datetime_datetime_widget_validate() to DateTimeDefaultWidget::massageFormValues().
Issue #2333357 by tstoeckler, benjy: Fixed Migrate node_revisions.timestamp into the revision_timestamp field.
Issue #2329837 by Cottser | davidhernandez: Move filter classes from preprocess to templates.
Issue #2335775 by slashrsm: Fixed LinkItem should promote "url" as it's main property.
Issue #2323899 by gauravkhambhala, Gábor Hojtsy, omers | jhodgdon: Provided default Node views need language filtering.
Issue #2221433 by damiankloip, dawehner: Clean up views rendering. Move stuff from template_preprocess_views_view(), into a #pre_render callback.
Issue #2333907 by YesCT, alexpott: Fixed FormatDateTest incorrectly implying a change to local interface language variable will change global assumed interface language langcode.
Issue #1664268 by droplet, G-raph, csakiistvan: Drop some browser specific prefixes.