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

Issue #2554219 by nod_, larowlan, tim.plunkett, regilero, droplet, japerry, samuel.mortenson, Pere Orga, effulgentsia, benjy, Gábor Hojtsy, greggles, Wim Leers, David_Rothstein, pwolanin, neclimdul, EclipseGc, znerol: Port Cross-site Scripting - Ajax system fixes from SA-CORE-2015-003 to Drupal 8

Issue #977844 by Wim Leers: Remove the 'every_page' option for CSS/JS assets: it is confusing, even damaging

Revert "Revert "Issue #2510104 by pwolanin, nod_, Fabianx, Wim Leers, droplet, Pere Orga: Convert drupalSettings from JavaScript to JSON, to allow for CSP in the future""

This reverts commit e8e883f9.