This reverts commit cc84f390 - bad
commit message.

Issue #2089631 by Wim Leers | jessebeach: Fixed Showing/hiding of CKEditor plugin settings is fragile, automate it (breaks in narrow viewports and when enabling CKEditor).

Revert "Issue #2089631 by Wim Leers | jessebeach: Fixed Showing/hiding of CKEditor plugin settings is fragile, automate it (breaks in narrow viewports and when enabling CKEditor)."

This reverts commit 46db1365.

Issue #2089631 by Wim Leers | jessebeach: Fixed Showing/hiding of CKEditor plugin settings is fragile, automate it (breaks in narrow viewports and when enabling CKEditor).

Issue #2105167 by tim.plunkett: Fixed Legacy local actions are added alongside modern local actions.

Issue #2084535 by mErilainen, tankerjoe, DanielFbrg: Fix file_copy documentation around the case when source and destination are the same

Issue #2089327 by thedavidmeister, Cyberschorsch: Remove / deprecate calls to drupal_strip_dangerous_protocols() use \Drupal\Component\Utility\Url::stripDangerousProtocols().

Issue #2057401 by plach, socketwench, kfritsche, Damien Tournoud: Fixed Make the node entity database schema sensible.

Issue #2099467 by moshe weitzman, chx: Let non-interactive installers determine mode of files directory and its subdirectories.

Issue #2101661 by swentel: Fixed Update cache checking logic in core/includes/langauge.inc to use config system.

Issue #2089351 by thedavidmeister, meba: Convert all calls to check_plain() in core to Drupal\Component\Utility\String::checkPlain() in core/includes.

Issue #1829170 by LinL, socketwench, vijaycs85, mtift, LittleCoding, andypost, dawehner, ianmthomasuk: Convert the Maintenance Theme variable to settings.

Revert "Issue #2057401 by plach, socketwench, kfritsche: Fixed Make the node entity database schema sensible."

HEAD broken; rolling back temporarily.

This reverts commit c72f39ad.

Issue #2057401 by plach, socketwench, kfritsche: Fixed Make the node entity database schema sensible.

Issue #2049207 by dlu, blakehall, janstoeckler, ramlev, Moderate | Cottser: Replace .tpl.php with .html.twig in documentation.

Issue #1798732 by sun, Dean Reilly, mbrett5062, chx, westie, alexpott, juanolalla, Mark Carver, catch, jthorson, cam8001, Berdir: Convert install_task(), install_time() and install_current_batch() to use the state system.

Issue #2100329 by cosmicdreams: Use \Drupal instead of Drupal to make IDEs and static code analyse tools happy.

Issue #2002650 by mrsinguyen, chertzog, legolasbo, Erik Erskine, rhm50, sandergo90, grisendo, targoo, janstoeckler, maximpodorov, beowulf1416: Improve maintainability by removing unused local variables.

Issue #2077473 by dawehner, damiankloip, pwolanin: Replace local action plugin discovery with YamlDiscovery and handle routes with parameters.

This reverts commit 227f21b3.

Issue #2100753 by Berdir: Fixed route_parameters break lazy-save logic in MenuLinkStorageController::save().

Issue #2004244 by Berdir, plach, tim.plunkett, msonnabaum, das-peter: Move entity revision, content translation, validation and field methods to ContentEntityInterface.

Issue #1751194 by Cottser, mikl, effulgentsia, benjifisher: Introduce hook_theme_suggestions_HOOK() and hook_theme_suggestions_HOOK_alter().

Issue #1839318 by JohnAlbin, echoz: Added Replace drupal.base.css library with normalize.css for all themes.