Issue #2029405 by YesCT, vijaycs85, rahul.shinde: Write configuration schema for node types.
Issue #2035839 by vijaycs85: Fixed Align block config schema with block configuration.
Issue #2038285 by vijaycs85, Gábor Hojtsy: Update configuration schema for date formats as entities.
Issue #1812048 by mikeker, Pancho, dawehner, tim.plunkett: Build the exposed form using form API functions.
Issue #2028511 by damiankloip, dawehner: Allow plugin derivative classes to use services from the container.
Issue #2038233 by tim.plunkett: Convert TipPluginManager to extend DefaultPluginManager.
Issue #1818976 by bleen18: Fixed Several update functions incorrectly return NULL values.
Issue #2039961 by klausi: Fixed uri_field() should use uri type as value.
Issue #2029455 by vollepeer: Typo in tip for 'Full HTML'.
Issue #2044865 by Gábor Hojtsy: Fixed Picture mappings cannot be edited.
Issue #2008270 by mcjim, typhonius: Remove drupal_add_css() from _drupal_maintenance_theme() — use #attached.
Issue #1990544 by fubhy, Pancho, h3rj4n, dawehner: Convert system_modules() to a Controller.
Issue #2033413 by catch: fix file permissions, whoops.
Issue #2030551 by marcingy: Fixed PHP notice when creating new Drupal user.
Issue #2029375 by damiankloip: Rename ModuleEnable test to ModuleEnableTest.
Issue #1589968 by cr0ss, Cottser, Pancho, DarthDrupal, Mark Carver: Move Title from process to preprocess, remove template_process_page().
Issue #2035315 by dawehner: Add a dedicated @FieldWidget annotation.
Issue #1963986 by chrisjlee, designesse, joelpittet, waynethayer: Convert theme_views_ui_view_info() to Twig.
Issue #1913162 by katbailey: Remove unused 'matcher' compiler pass.
Issue #1938938 by duellj, Risse: Convert theme_user_admin_permissions() to table #type.