Issue #2513402 by pixelmord, cilefen, prajaankit, jcnventura, webchick, nicrodgers, Bojhan, g.oechsler, xjm, ifrik, Wim Leers: Any time a user creates a thing and saves, display a link to the thing created in the status

Issue #2718583 by alexpott: Remove deprecated usages of Node::setRevisionAuthorId() and Node::getRevisionAuthor()

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

Issue #2471689 by klopez, shashikant_chauhan, harings_rob, snehi, jhodgdon: Entity API documentation should consistently refer to handlers rather than controllers

Issue #2566419 by amateescu, dawehner, jhedstrom, hchonov, hussainweb, jibran: Using the "Autocomplete (Tags style)" widget for the author field does not save the submitted user

Issue #2453175 by tim.plunkett, plach, rteijeiro, effulgentsia, eshta, dawehner, fago, Berdir, alexpott: Remove EntityFormInterface::validate() and stop using button-level validation by default in entity forms

Issue #1392754 by tss, justAChris, jhodgdon: Comply with new documentation standards for @file for namespaced class files

Issue #2395831 by dawehner, fago, martin107, cafuego, YesCT, plach, jibran, larowlan, Wim Leers, effulgentsia, klausi: Entity forms skip validation of fields that are not in the EntityFormDisplay

Issue #2428795 by mkalkbrenner, plach, yched, catch, hchonov, webchick, tstoeckler, pjonckiere, miro_dietiker, Schnitzel, klausi: Translatable entity 'changed' timestamps are not working at all

Revert "Issue #2459753 follow-up by tim.plunkett, alexpott: EntityForm::validate() should be able to modify the form structure"

This reverts commit fb5ea78b.

Issue #2459753 follow-up by tim.plunkett, alexpott: EntityForm::validate() should be able to modify the form structure

Revert "Issue #2459753 by tim.plunkett: EntityForm::validate() should be able to modify the form structure"

This reverts commit d4d83576.

Issue #1919930 by tim.plunkett, nlisgo: Bundle entity form IDs violate module namespaces (both on server-side + front-end CSS)

Issue #2421263 by alexpott, formatC'vt, kim.pepper, andypost, larowlan, chx: Potential data loss: concurrent (i.e. by different users) node edits leak through preview

Issue #2421581 by amateescu: Node preview causes stale values to be kept indefinitely for exisiting nodes

Issue #2406103 by Berdir, alexpott: Remove hook_node_validate() and hook_node_submit() because they bypass the entity API

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

git commit -m 'Issue #2377397 by Wim Leers, alexpott: Themes should use libraries, not individual stylesheets'

Issue #2340667 by YesCT, Pedro Lozano, alexpott, martin107: Protect Drupal\Core\Language\Language::id, and use getId().

Issue #2277103 by tim.plunkett, pwolanin, Wim Leers, dawehner, hotpizzas: Switch Drupal::l() and LinkGenerator to expect a Url object.

Issue #2343651 by xjm, tim.plunkett, Wim Leers, dinarcon, dawehner: Remove most remaining l() calls.

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 #2324121 by Berdir, slashrsm, alexpott: Fixed NodeType's settings array was meant to be able to store information from mutliple modules.

Issue #2226493 by Berdir, Wim Leers, m1r1k, mr.baileys, andypost, scor, cbr, joelpittet: Apply formatters and widgets to Node base fields.

Issue #2313931 by Berdir: Merge ['controller'] with ['build_info']['callback_object'] and add a method for it.

Issue #2309323 by Berdir, tim.plunkett: Allow #submit and #validate to be specified as methods of the form object.

Issue #1510544 by swentel, Bojhan, Gábor Hojtsy, merlinofchaos, Cottser, Wim Leers, plopesc, aspilicious, sannejanssen,  larowlan, tim.plunkett, nod_: Fixed Show previews in front-end theme, able to select different view modes.