Issue #2181601 by damiankloip: Drupal\serialization\Normalizer\EntityNormalizer should extend ComplexDataNormalizer.
Issue #2292821 by andypost, larowlan: Use widget for comment subject field.
Issue #2302511 by Elijah Lynn:  (optional) improvements in docblock for Drupal.viewsUi.FormFieldFiller in views-admin.js.
Issue #2196241 by sun, alexpott: Remove string translation services from TestBase container.
Issue #2284103 by alexpott, fabpot, damiankloip, Xano, Xen, Berdir: Fixed Remove the request from the container.
Issue #2115631 by andypost, socketwench: Fixed CategoryFormController::form() should not define form actions.
Issue #2301239 by pwolanin, dawehner, Wim Leers, effulgentsia, joelpittet, larowlan, xjm, YesCT, kgoel, victoru, berdir, likin, and plach: MenuLinkNG part1 (no UI or conversions): plugins (static + MenuLinkContent) + MenuLinkManager + MenuTreeStorage.
Issue #2289063 by larowlan, andypost | Berdir: Change contact message entity to behave more like a normal entity.
Issue #2296839 by MKorostoff, er.pushpinderrana | YesCT: Remove deprecated comment_num_new().
Issue #2302525 by tim.plunkett: Convert file_module_test_form to a class.
Issue #2302331 by kim.pepper: Move drupal_valid_path to PathValidator service.
Issue #1998198 by pwolanin, splatio, Albert Volkman, tim.plunkett, andypost, disasm, Les Lim, tkuldeep17: Convert user_pass_reset to a new-style Form object.
Issue #2078015 by er.pushpinderrana, RoSk0 | alexanansi: Modernize views_test_data.module forms.
Issue #2086499 by phiit, tim.plunkett | Gábor Hojtsy: Convert two page callbacks in language_elements_test.module to the new controller system.
Issue #2300829 by Jose Reyero: Fixed Clean up LocaleConfigManager / TypedConfigManager features and cache duplications.
Issue #2298665 by nod_: Fixed Remove dead code in form.js.
Issue #2302463 by effulgentsia: Cleanup User::hasPermission() and UserSession::hasPermission() to follow Law of Demeter.
Issue #2033211 by LewisNyman, tim.plunkett, JamesLefrère | yannickoo: Move Seven CSS files into css directory.
Issue #2202511 by hussainweb, benjy | mikeryan: Added Implement migration groups.
Issue #2291439 by Wim Leers, tstoeckler: Fixed CKEditor's "readonly" needs to be per-instance but is applied per-format, across instances.