(cherry picked from commit dc19a1b0)

SA-CORE-2018-003 by mlewand, wwalc, jcisio, Kyaw Min Thein, Wim Leers, larowlan, dawehner, drpal, xjm

(cherry picked from commit b839be0a)

Issue #2886904 by jhodgdon, andrewmacpherson, volkerk, Eric Heydrich, Vidushi Mehta, Utkarsh_Mishra, jenlampton, hosef, anavarre, adriancid, xjm, alexpott, mgerbault, tracipotocnik, BSpeel, yoroy, lauriii: display: block for details/summary hides drop arrows in Firefox (normalize.css update)

Issue #2933980 by richgerdes, Maheshwaran.j: JQuery UI CSS dependencies are not met in core.libraries.yml

This reverts commit 3c76c819.

Issue #2660124 by tim.plunkett, samuel.mortenson, phenaproxima, tstoeckler, yoroy, dead_arm, xjm, Manuel Garcia, EclipseGc, larowlan, DyanneNova, tedbow: Dynamically build layout icons based on well formed config

Issue #2784443 by tedbow, Wim Leers, Cottser, tim.plunkett, droplet, drpal, nod_, lauriii: Move off-canvas functionality from Settings tray module into drupal.dialog.ajax library so that other modules can use it

Issue #2898808 by effulgentsia, larowlan, drpal, droplet, cilefen: [regression] With jQuery3, modal tour tips lose their grey background and centering

Issue #2533498 by Manuel Garcia, effulgentsia, nod_, Dom., larowlan, drpal, Wim Leers, droplet: Update jQuery to version 3

Issue #2809427 by gnuget, Manuel Garcia, Wim Leers, nod_, sergeiimalyshev, tedbow, effulgentsia: Update jQuery UI to 1.12

Issue #2828494 by thpoul, Wim Leers, mlewand, tstoeckler, xjm, Tade0: Update CKEditor library to 4.6

Issue #2669802 by chr.fritsch, Berdir, seanB, bojanz, dawehner, yoroy, slashrsm, tstoeckler: Add a content entity form which allows to set revisions

Issue #2177293 by droplet, swentel, nod_, korven, LewisNyman, xjm, neclimdul: Drag and drop broken on touch enabled laptops

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

Issue #2566771 by Cottser, mortendk, jstoller, LewisNyman, mdrummond, Gints Ērglis, sqndr, Chernous_dn, Manjit.Singh, axe312, emma.maria, davidhernandez, lauriii, jaxxed, akalata: [Voltron patch] Move all remaining *.theme.css to Classy