Issue #2878556 by plach, matsbla, vijaycs85, Gábor Hojtsy, catch, gabesullice, effulgentsia, hchonov, hass, amateescu, xjm: Ensure that changes to untranslatable fields affect only one translation in pending revisions

(cherry picked from commit 27c3b40e)

Revert "Issue #2225681 by quietone, Jo Fitzgerald, dipakmdhrm, Adita, maxocub, Gábor Hojtsy, phenaproxima, iMiksu, Manuel Garcia, catch: Migrate D6 i18n blocks translated strings"

This reverts commit b53e50d7.

Issue #2225681 by quietone, Jo Fitzgerald, dipakmdhrm, Adita, maxocub, Gábor Hojtsy, phenaproxima, iMiksu, Manuel Garcia, catch: Migrate D6 i18n blocks translated strings

Issue #2873696 by nvexler, wengerk, gido, Jo Fitzgerald, xjm: Add @internal to core classes, methods, properties to Form Classes

Issue #2901739 by andriyun, Jo Fitzgerald, mfernea, xjm: Fix 'Squiz.Arrays.ArrayDeclaration' coding standard

Issue #2854732 by amateescu, jibran, tstoeckler: Use initial values for content translation metadata fields and fix existing data

Issue #2870441 by naveenvalecha, dawehner, Lendude: Convert web tests to browser tests for content_translation module

Issue #2068063 by timmillwood, Berdir, tduong, Manuel Garcia, nlisgo, yongt9412, esod, lauriii, jonathan1055, vijaycs85, yoroy, amit.drupal, tkoleary, ifrik, Bojhan, xjm, tstoeckler, amateescu: Change "Save and keep un-/published" buttons to a "Published" checkbox and an included "Save" button

Issue #2747167 by michielnugter, dawehner, Lendude, mglaman, Mac_Weber, Jo Fitzgerald, klausi: Convert first part of web tests of views_ui

Issue #2848120 by kristiaanvandeneynde, tim.plunkett, Pavan B S, tstoeckler: Short term fix: Make ContentTranslationController recognize 'add' and 'edit' form handlers

Issue #2575535 by bighappyface, heykarthikwithu, rodrigoaguilera, prasad_gogate:  Custom language settings configuration is not saved when you have a language selector enabled for any content

Issue #2854529 by alexpott, xjm, klausi, Chi, Mixologic: Fix Drupal.Scope.MethodScope - all methods should have scopes

Issue #2776975 by joelpittet, dawehner, tim.plunkett, xjm, pfrenssen: March 3, 2017: Convert core to array syntax coding standards for Drupal 8.3.x RC phase

Issue #2770921 by dawehner, klausi, Mile23, mpdonadio, xjm, claudiu.cristea: Feb 21st: Convert chunk of WTB to BTB by just moving classes, changing use statements adding traits

Issue #2665152 by alexpott, Andrej Galuf, tfranz, longwave, andypost, jsimonis, bojanz: Simplify module form structure and fix bugs when Suhosin is used

Revert "Issue #2665152 by alexpott, Andrej Galuf, tfranz, longwave, jsimonis, andypost, bojanz: Certain modules can't be enabled when Suhosin is used"

This reverts commit 7f37114a.

Issue #2665152 by alexpott, Andrej Galuf, tfranz, longwave, jsimonis, andypost, bojanz: Certain modules can't be enabled when Suhosin is used

Issue #665790 by chrisrockwell, Sumit kumar, lauriii, joelpittet, sun, vulcanr, vaplas, yoroy, leahtard, tompagabor, aspilicious, ckrina, Gábor Hojtsy, David_Rothstein, Manuel Garcia, rootwork, nod_, kostyashupenko, pguillard, Bojhan, droplet, typhonius, wturrell, mgifford, webkenny, cosmicdreams, tkoleary, YesCT, marcvangend, markabur, LewisNyman, mrfelton, oriol_e9g, prabhu9484, catch, hedrickbt, tsvenson, longwave, dww, kika, borisson_, rdellis87, realityloop, klonos: Redesign the status report page

Issue #2675010 by hchonov, Berdir, yongt9412, tstoeckler: Cloned entity will point to the same field objects if the clone was created after an entity translation has been initialized

Issue #2194783 by Berdir, vprocessor, andypost, Antonnavi, tim.plunkett, Crell, Mile23, catch: Rename EntityTypeInterface::isSubclassOf() to ::entityClassImplements()

Issue #2669802 by chr.fritsch, Berdir, seanB, bojanz, dawehner, yoroy, slashrsm, tstoeckler: Add a content entity form which allows to set revisions

Issue #2225775 by vasi, quietone, phenaproxima, chx, penyaskito, mikeryan, esclapes, vprocessor, steinmb, Gábor Hojtsy, Marc Angles, bwinett: Migrate Drupal 6 core node translation to Drupal 8

Issue #2701769 by snufkin: Missing @return documentation from ContentTranslationHandler::entityFormTitle

Issue #2719695 by alexpott, Mile23: Fix 'Drupal.Classes.ClassDeclaration.CloseBraceAfterBody' coding standard

Issue #2716685 by Mile23: Part 2: Fix several errors in the 'Drupal.Commenting.DocComment' coding standard

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

Issue #2651986 by maxocub, balagan, Tom Robert, Kristen Pol, tstoeckler: Local task link "Translate" is not translated

Issue #2686765 by sidharthap, thhafner: cacheUntilEntityChanges() is deprecated and should be replaced with addCacheableDependency()

Issue #2572125 by rodrigoaguilera, vijaycs85, swentel, Berdir, Wim Leers, tstoeckler: Content translation local tasks are not getting displayed due to caching

Issue #2502917 by dimaro, rakesh.gectcr, DuaelFr, suhel.rangnekar: Replace deprecated usage of entity_create used with variable entity types with a direct call to EntityManager::getStorage()->create()

Issue #2342015 by Chi, joelpittet, vijaycs85, Matt V., Gábor Hojtsy, alexpott, catch: Content Translation module still implements hook_enable