Issue #1877638 by fago, Gaelan, YesCT, das-peter, tim.plunkett, smiletrl: Rename getOriginalEntity() and remove duplicated functions from ConfigEntityBase.

Issue #1787238 by aspilicious, swentel, yched | pcambra: Convert options module formatters to Plugin system.

Issue #1964348 by damiankloip, xjm, dawehner: Rename DisplayPluginBase::getStylePlugin() and enable type filtering for more plugin types.

Issue #1912568 by typhonius, Berdir: Convert drupal_http_request() usage in SearchRankingTest.php to Guzzle.

Issue #1875614 by Sutharsan, YesCT, Berdir:  Convert drupal_http_request() usage in locale.batch.inc to Guzzle.

Issue #1969276 by effulgentsia, tim.plunkett, EclipseGc: Refactor block plugins to make room for a BlockBase::build() implementation.

Issue #1946428 by foopang | mtift: Convert all of confirm_form() in menu.admin.inc to the new form interface.

Issue #1963976 by shanethehat, Cottser: Remove theme_views_tab() and theme_views_tabset() declarations from views_ui_theme().

Issue #1963798 by tim.plunkett, damiankloip: Fixed Page displays cannot be deleted unless they have a valid path.

Issue #1967728 by Wim Leers: Fixed In-place editing toolbars in DOM not removed after stopping in-place editing.

Issue #1937824 follow-up by echoz, mariacha1: Simpler fix for Improve button-link spacing on confirm form.

Issue #1849610 by mgifford, edrupal, dawehner, rootwork, falcon03: Improve 'add' links accessibility.

Issue #1967420 by tim.plunkett, dawehner: Allow Core\AnnotatedClassDiscovery to pass all parameters to the constructor of Component\AnnotatedClassDiscovery.

Issue #1946414 by larowlan | mtift: Convert confirm_form() in forum.admin.inc to the new form interface.