Issue #2050759 by tim.plunkett, fietserwin: Move drupal_chmod and other code in file.inc to a Drupal\Core\File\FileSystem class

Issue #2066557 by mparker17, valthebald, chakrapani: Convert system.module's test's database_test.module's JSON functions to a new-style controller

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

Issue #2417877 by pwolanin: Make getDefinition method on menu link content entity public so we can rebuild user paths

Issue #2417809 by YesCT: link and shortcut have baseFieldDefinition settings that do not do anything: default_value max_length

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

Issue #2417333 by Wim Leers, pwolanin, xjm, dawehner: Add support for user-path: scheme to Url class

Issue #2412509 by kgoel, pwolanin, Wim Leers, larowlan, effulgentsia, dawehner, xjm: Change LinkItem.uri to type 'uri' rather than 'string' and introduce user-path: scheme

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 #2398689 by jeqq: Follow-up: Applying entity schema updates still fails when both field and entity type definitions changes

Issue #2410123 by jeqq: Use mutable configuration to fix compatibility in update_fix_compatibility()

Issue #2306407 by lauriii, penyaskito, mortendk, pakmanlh, Wim Leers, ypogue: Remove breadcrumb from page template

Issue #2343043 by cilefen, hussainweb: valid_email_address() should use egulias/EmailValidator and become deprecated

Issue #2409581 by geertvd, balagan: Views UI generates translated HTML class names for handlers / buckets

Issue #2412241 by idebr, Wim Leers: Active menu links with identical paths get a duplicate "active" class for every active menu link

Issue #1728804 by Berdir: Introduce (Content)EntityDeleteForm and children to handle entity deletions

Issue #2341357 by xjm, dawehner, larowlan, Wim Leers: Views entity area config is not deployable and missing dependencies

Issue #2364157 by mpdonadio, dawehner, martin107, Berdir, pcambra, naveenvalecha, tim.plunkett: Replace most existing _url calls with Url objects

Issue #2411333 by almaudoh, hussainweb, Wim Leers, pwolanin, larowlan, dawehner, RavindraSingh, jibran: Create standard logic to handle a entity: URI scheme

Revert "Issue #2388749 by alexpott, adci_contributor, ParisLiakos: Register symfony's mime guessers if they are supported"

This reverts commit 4dae1d99.

Issue #2235457 by dawehner, amateescu, hussainweb, Berdir, benjy, Wim Leers, lokapujya, RavindraSingh, Ryan Weal, jibran, Jalandhar: Use link field for shortcut entity

Issue #2414047 by dawehner, larowlan: MenuLinkContent calls getUrlInfo('content-translation-overview') when it should be 'drupal:content-translation-overview'

Issue #2388749 by alexpott, adci_contributor, ParisLiakos: Register symfony's mime guessers if they are supported