Issue #1920686 by swentel: Fixed Deleting a menu gives fatal error + the delete button is shown on system menu's.

Issue #1899514 by sun, Dave Reid: Fixed ModuleHandlerInterface::getHookInfo should not be protected.

Issue #1904882 by balsama, YesCT: Entity reference field Reference method Default settings order should be Filter by then Sort by.

Issue #1928082 by vijaycs85, YesCT, alexpott: Fixed Make usage of book.settings:allowed_types() consistent.

Issue #1921996 by damiankloip, tim.plunkett, larowlan: Convert system_config_form() to implement FormInterface as a base class.

Issue #1920278 by dawehner, greggles: Indicate that "administer views" and "access all views" is kind of a big deal by making it "restrict access" -> true.

Issue #1784812 by Floydm, beltofte, joates: Standardize capitalization on actions in language date time: 'reset'.

Issue #1855208 by bryanbraun, jessebeach: Added Toolbar tray needs to fix to top of screen on scroll.

Issue #1855208 by bryanbraun, jessebeach: Added Toolbar tray needs to fix to top of screen on scroll.

Issue #1922814 by Berdir, Damien Tournoud, pwolanin, David_Rothstein, Heine, Bèr Kessels: Fixed Denial-of-service vulnerabiility in Image module.

Issue #1927546 by alexpott, catch, Gábor Hojtsy: Fixed Langcode column added to search_index() and search_dataset() tables but there is no upgrade path.

Issue #1798734 by Berdir, ACF, leschekfm, heyrocker, alexpott: Convert drupal_private_key() to the configuration system.

Issue #1784846 by beltofte, Floydm: Standardize capitalization on actions in operations in shortcut: 'list links', 'edit set', 'delete set', 'edit, 'delete'.

This reverts commit 172318fb.

Issue #1763640 by beejeebus, alexpott, Jose Reyero, c31ck, das-peter, YesCT, heyrocker, Gábor Hojtsy: Introduce config context to make original config and different overrides accessible.