Issue #1966436 by naveenvalecha, cesarmiquel, Berdir, mr.york, jlbellido, segi, vasi1186, Leksat, Gábor Hojtsy, Schnitzel, grisendo, Aron Novak, likin, penyaskito, vijaycs85, kfritsche, fago: Fixed Default *content* entity languages are not set for entities created with the API.
Issue #2326891 by tim.plunkett, jhodgdon: Convert system_element_info() to Element classes.
Issue #2328777 by tim.plunkett: Refactor FAPI getCache()/setCache() into a standalone class.
Issue #2329303 by tim.plunkett, dawehner: Fixed Use the right request when determining the theme on a 403 page.
Issue #2328785 by tim.plunkett: Convert form_load_include() to FormState::loadInclude().
Issue #2121713 by tim.plunkett, dawehner, rteijeiro, jiv_e: Move drupal_html_id() and drupal_html_class() to Drupal\Component\Utility.
Issue #2328061 by tim.plunkett: Move datetime's FormElement #type classes in Core.
Issue #2329429 by dawehner: Fixed Permission page order is all wackadoo.
Issue #2321621 by swentel: Fixed Use signatures checkbox on User config page doesn't appear.
Issue #2323721 by dawehner, chx: Fixed [sechole] Link field item and menu link information leakage.
Issue #1974048 by Gábor Hojtsy, vijaycs85, er.pushpinderrana, Sutharsan, penyaskito, bserem: Fixed Limited display of languages when going back in installer is confusing.
Issue #2328995 by znerol: Remove unused and defective WebTestBase::drupalGetToken().
Issue #2329009 by znerol: Fixed SummaryLengthTest::testSummaryLength() must not alter WebTestBase::loggedInUser.
Issue #2310415 by cilefen, ednawig, TravisCarden: Fixed run-tests.sh does not handle the error when invalid test groups/classes are specified.
Issue #1842362 by vijaycs85, Sutharsan, Berdir, ocsilalala, skipyT: Replace locale_project table and improve caching.
Issue #2318429 by janoka: Fixed Language condition / block language visibility includes useless options.
Issue #2270323 by sun, dawehner, neclimdul: Remove DRUPAL_ROOT constant redefinitions from unit tests.
Issue #2328629 by Berdir: Fixed Comment::hasParentComment() tries to load comment with ID 0.
Issue #2327373 by dawehner: Standardize view entity route names.
Issue #2188675 by Gábor Hojtsy, marthinal, fran seva, robertdbailey, Jalandhar, vijaycs85, dlu, kfritsche, YesCT, pfrenssen: Fixed Translate local task always visible, leads to WSOD.