Issue #1946410 by tim.plunkett: Convert confirm_form() in filter.admin.inc to the new form interface.

Issue #1946366 by kim.pepper: Convert confirm_form() in contact.admin.inc to the new form interface.

Issue #1949724 by chx, effulgentsia, xjm, jibran, rootatwc: Allow simpletest child sites to additionally load a test-specific settings.php to allow testing anonymous and configless updates.

Issue #1956912 by dawehner, damiankloip, tim.plunkett: Fixed Title area handler sets the title even when it should not (results in 'Welcome to Drupal' never going away).

Issue #1940208 by pameeela, mgifford, echoz: Fixed Contrast for add & remove shortcut links on overlay not sufficient for WCAG - Regression.

Issue #1937824 by mariacha1, keyhitman, pixelmord, pameeela: Fixed Improve button-link spacing on confirm form.

Issue #1614108 by Xano, bartmcpherson: Add documentation to hook_field_extra_fields for missing properties in return array

Issue #1943800 by mtift: Fixed form_execute_handlers() has an undocumented return which is never used.

Issue #1785318 by peterpoe, dawehner, dagmar, damiankloip: Fixed Grouped filter doesn't allow you to use fields without a value.

Issue #1942134 by sandipmkhairnar | vijaycs85: Fixed Make Image module active config save format match the default yml file.

Issue #1924368 by JohnAlbin, ykhadilkar, carwin: Change notice: Rename old CSS constants to CSS_AGGREGATE_* and add new CSS weight constants.

Issue #1931976 follow-up by linclark, effulgentsia: Support deserialization for hal+json (minor nit fixes).

Issue #1888390 by dawehner, damiankloip, tim.plunkett: Change 'human_name()' to 'label' and replace View::getHumanName() with View::label().

Issue #1289336 by JimmyAx, marcingy, rooby, no_commit_credit | janipuni: Fixed D8 test coverage: Calling node_view() for the same node with muliple view modes on the same page does not correctly attach fields.

Issue #1889328 by gielfeldt, gumanist: Fixed Not all objects respect the query option throw_exception.