Issue #2981652 by ApacheEx, corbacho, drpal, dawehner, xjm, alexpott, lauriii: Format core JavaScript using recently add Prettier

(cherry picked from commit e742590e)

Issue #2925064 by drpal, dawehner, droplet, xjm, webchick, justafish: [1/2] JS codestyle: no-restricted-syntax

Revert "Issue #2925064 by drpal, dawehner, xjm, justafish, droplet: [1/2] JS codestyle: no-restricted-syntax"

This reverts commit b0a4d7e0.

Issue #2925064 by drpal, dawehner, xjm, justafish, droplet: [1/2] JS codestyle: no-restricted-syntax

Issue #2765525 by phenaproxima, Wim Leers, droplet: Add AJAX command to add style sheets to CKEditor instances

Issue #2729663 by dmsmidt, thpoul, SKAUGHT, Wim Leers, Lendude, droplet, effulgentsia, xjm, Reinmar, alexpott: Fragment link pointing to <textarea> should be redirected to CKEditor instance when CKEditor replaced that textarea

Issue #2239419 by thpoul, Wim Leers, webchick, maczizek, xjm, mlewand, Jeff Burnz, tstoeckler, Tade0, Bojhan, yoroy, tkoleary, darketaine, hass, sun, maxilein, nod_, alexpott, Feuerwagen, oleq: Include CKEditor's AutoGrow plug-in

Issue #2679903 by thpoul, Dave Reid, Wim Leers: CKEditor uses separate cache-busting query string from Drupal's

Issue #2548195 by nod_, JohnAlbin, madhavvyas, sriharsha.uppuluri: Only use single quotes in JavaScript and update .eslintrc

Issue #2118663 by cdog, nod_: Remove the Drupal.checkWidthBreakpoint method from drupal.js; replace with window.matchMedia where appropriate

Issue #2485425 by MathieuSpil, iro, saki007ster, Wim Leers, Manjit.Singh, wiifm, kostask, Studiographene, alvar0hurtad0, LewisNyman: Clean up editor CSS inline with our CSS standards

Issue #1533366 by nod_, valthebald, Jelle_S, Wim Leers: Simplify and optimize Drupal.ajax() instantiation and implementation

Issue #2472323 by dawehner, neclimdul, Crell, kim.pepper, nod_, Wim Leers, larowlan, jibran, pwolanin, catch: Move modal / dialog to query parameters

Issue #2292035 by DimitriV, mgifford | andrewmacpherson: Fixed CKEditor uses the automatically generated ID attribute for the body field in the ARIA label.

Issue #2291439 by Wim Leers, tstoeckler: Fixed CKEditor's "readonly" needs to be per-instance but is applied per-format, across instances.

Issue #1913510 by erich_s, jibran, scresante, nod_, mitron: Core Javascript Files Not Using Standard Indentation.

Issue #2067427 by Wim Leers: Fixed Drupal.editors.ckeditor.attachInlineEditor() should pass Drupal-specific settings like Drupal.editors.ckeditor.attach() does.

Issue #1879120 by quicksketch, Wim Leers, larowlan, frega: Use Drupal-specific image and link plugins — use core dialogs rather than CKEditor dialogs, containing alterable Drupal forms.

Issue #1936392 by Wim Leers: Configure CKEditor's 'Advanced Content Filter' (ACF) to match Drupal's text filters settings.

Issue #1894644 by Wim Leers, quicksketch: Unidirectional editor configuration -> filter settings syncing.

Issue #1995730 by Wim Leers: Drupal.editors.ckeditor.onChange() misses changes made by last keypress — leads to data loss.

Issue #1964316 by Wim Leers: Automatically use 'sourcedialog' plugin/button instead of 'sourcearea' plugin/button when using CKEditor for in-place editing.

Issue #1886566 by Wim Leers, sun, effulgentsia, quicksketch: Make WYSIWYG editors available for in-place editing.

Issue #1890502 by Wim Leers, quicksketch, jessebeach, nod_, sun, effulgentsia: Added CKEditor module to core.