Issue #1792032 by balsama, bjorpe | lxs: Fixed File validation error message not removed after subsequent upload of valid file.

Issue #1980338 by vineet.osscube, nick_schuch: Fixed Fatal error: Class 'plugin.manager.block' not found in /core/modules/system/system.module on line 1162.

Issue #2004784 by chx, effulgentsia: Move module enable/disable/uninstall implementations into ModuleHandler.

Issue #1057656 by mondrake, chx: Fixed Image styles don't flush for images stored non-default schemes.

Issue #1791970 by marvil07, drumm: Added Optionally detect tar.* as extension instead of * on views file extension field handler.

Issue #1966298 by das-peter, andypost, Gábor Hojtsy, amateescu, YesCT: Introduce menu link bundles per menus.

Issue #1634442 by chia, Berdir, amateescu, fago: Fixed DatabaseStorageController can't catch exceptions.

Issue #1968020 by damiankloip, dawehner: Convert ReorderDisplays to use table rendering and remove theme function.

Issue #1468210 followup by David_Rothstein: Fixed Remove special ->uid == 1 check in file_validate_size().

Issue #1498674 by plach, das-peter, Schnitzel, dawehner, YesCT, attiks, Berdir, Gábor Hojtsy, Soul88, Carsten Müller: Refactor node properties to multilingual.

Issue #1938386 by andypost, mkadin, tim.plunkett: Convert contact_category_()* pages to a new-style Controller.

Issue #1987850 by oenie, vijaycs85, cosmicdreams, amateescu: Convert system_theme_disable() to a new style controller.

Issue #1909418 by tim.plunkett, damiankloip, larowlan, dawehner, kim.pepper: Allow Entity Controllers to have their dependencies injected.

Issue #1998258 by nick_schuch: Fixed All term href's on overview page are 'taxonomy/term/()' instead of 'taxonomy/term/1'.

Issue #1620010 by dawehner, ParisLiakos, plach, jibran: Move LANGUAGE constants to the Language class.

Issue #1996644 by abghosh82 | joachim: Fixed user_login_name_validate() uses isset() where other user login form validation handlers use !empty().

Issue #1938184 by Xano, ParisLiakos, franskuipers, clemens.tolboom: Convert Drupal\Core\Utility\Color\ColorTest to PHPUnit.

Issue #1843744 by joelpittet, kgoel, Hydra, tsi, chrisjlee, shanethehat, jenlampton, mr.baileys, Cottser, socketwench: Convert views/templates/views-view.tpl.php to twig .

This reverts commit 4f6113f5.

Issue #1843748 by tlattimore, shanethehat, geoffreyr, Cottser, Hydra, joelpittet, widukind, c4rl, rcaracaus: Convert views/templates/views-view-fields.tpl.php to twig.

Issue #2003578 followup by chx: twig_cache() must be FALSE in install.php registerTwig because we don't know if files folder is writable yet.

Issue #2003578 by Jon Pugh, joelpittet: Fixed twig_cache() must be FALSE in install.php registerTwig because we don't know if files folder is writable yet.