Issue #2665992 by alexpott, klausi, heykarthikwithu, xjm, tstoeckler: @file is not required for classes, interfaces and traits

Issue #2418031 by BassistJimmyJam, pwolanin, tadityar, Wim Leers: Remove MenuLinkContentForm::doValidate() since the logic was moved to LinkWidget::validateUriElement()

Issue #2349071 by Upchuk, Cottser, pwolanin: EntityStorageException when trying to save a link over the maximum depth

Issue #2417793 by effulgentsia, Wim Leers, YesCT, yched, dawehner: Allow entity: URIs to be entered in link fields

Issue #2416955 by dawehner, YesCT, amateescu, jibran, yched, anavarre: Convert MenuLinkContent to use a link widget

Issue #2406749 by dawehner, YesCT, amateescu, hussainweb, kim.pepper, RavindraSingh, pwolanin, Wim Leers, Gábor Hojtsy, yched, jibran: Use a link field for custom menu link

Issue #2230637 by plach, fran seva, yched, swentel: Create a Language field widget and the related formatter

Issue #2355909 by penyaskito, alexpott, Gábor Hojtsy, DuaelFr: language.settings config is not scalable

Issue #2343759 by pwolanin, larowlan, dawehner, tim.plunkett, effulgentsia, xjm, Wim Leers: Provide an API function to replace url()/l() for external urls.

Issue #2335659 by tim.plunkett, dawehner, effulgentsia, sun: Remove FormState ArrayAccess usage from core.

Issue #2022875 by Berdir, alexpott, Xano, swentel, tim.plunkett, vladan.me: Resolve difference between submitForm(), submit(), and save() in EntityFormController.

Issue #2305707 by cilefen, pwolanin, dawehner, LinL: MenuLinkContent disabled field should be renamed to enabled and use positive logic.

Issue #2313811 by undertext | andyceo: Fixed Inconsistent interface location: core/modules/menu_link_content/src/Entity/MenuLinkContentInterface.php.

Issue #2308821 by tim.plunkett: Replace FormErrorInterface with $form_state->setErrorByName() and $form_state->setError().

Issue #2301317 by pwolanin, dawehner, Wim Leers, effulgentsia, YesCT, xjm, alexpott: MenuLinkNG part4: Conversion.

Revert "Issue #2301317 by pwolanin, effulgentsia, Wim Leers, dawehner, alexpott: MenuLinkNG part4: Conversion."

This reverts commit fd2db9cd.

Issue #2301317 by pwolanin, effulgentsia, Wim Leers, dawehner, alexpott: MenuLinkNG part4: Conversion.

Issue #2310705 by lokeoke, tim.plunkett, dawehner: AccessManager should introduce constants for 'ANY' / 'ALL'.

Issue #2301313 by pwolanin, dawehner, Wim Leers, effulgentsia, kgoel, YesCT, glide: MenuLinkNG part3 (no conversions): MenuLinkContent UI.