Issue #2004086 by dawehner, pwolanin, katbailey, tim.plunkett, vijaycs85, fabpot: The Request service must be synthetic.
Issue #2049207 by dlu, blakehall, janstoeckler, ramlev, Moderate | Cottser: Replace .tpl.php with .html.twig in documentation.
Issue #1793648 by nod_, kmox83, droplet, rteijeiro: Follow-up: replace all occurence of Drupal.settings with drupalSettings.
Issue #1941288 by larowlan, effulgentsia, dawehner, nod_: Fixed Regression: ajaxPageState not being updated with AjaxResponse, assets (js/css) being added twice.
Issue #1848880 by Wim Leers, effulgentsia: Test order of AJAX commands: add Ajax\FrameworkTest::testOrder(), strengthen testLazyLoad(), fix JS settings not being prepended.
Issue #1865926 by damiankloip: Don't need to call parent::setData() in AjaxResponse::prepare() method.
Issue #1875632 follow-up by nod_, Wim Leers, effulgentsia: Added wrapper function for JS settings merging behavior, fix tabledrag.
Issue #1812866 follow-up by mkadin, effulgentsia, Wim Leers: Fixed Rebuild the server side AJAX API.