Issue #3278415 by nod_, lauriii, catch, Wim Leers, longwave, xjm, claudiu.cristea: Remove usages of the JavaScript ES6 build step, the build step itself, and associated dev dependencies

Issue #3253148 by mherchel, longwave, ckrina, droplet: Remove IE from core's browserlist, remove non-essential CSS importing and recompile assets

Issue #3101543 by lauriii, bnjmnm, ravi.shankar, alexpott: Update core JavaScript dependencies listed in package.json

Revert "Issue #3101543 by lauriii, bnjmnm, ravi.shankar: Update core JavaScript dependencies listed in package.json"

This reverts commit 2dadb738.

Issue #3101543 by lauriii, bnjmnm, ravi.shankar: Update core JavaScript dependencies listed in package.json

Issue #2884052 by zviryatko, Krzysztof Domański, alexpott, drclaw, vijaycs85, Madis, charlotte.b, mcdruid, Berdir, lauriii: Uploading a managed file on a custom form that allows multiple files also triggers the remove button which results in a duplicate temporary record and results in the file being deleted

Issue #2635712 by bendeguz.csirmaz, DeFr, redgluten, swentel, SylvainM, Wim Leers, SiliconMind, dbyers55, catapipper: Cannot use Quick Edit to delete an image

Issue #2662932 by Darren Oh, imre.horjan, droplet, nod_, mohit1604, Peter Swietoslawski, swentel: Fix file upload progress bar

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

Issue #2473943 by Manjit.Singh, Cottser, mu5a5hi, LewisNyman, mortendk, rteijeiro, rachel_norfolk: Prefix form-file and form-managed-file classes with js-

Issue #2473953 by mortendk, rteijeiro, rachel_norfolk, Cottser, aburrows, LewisNyman: Prefix form-submit classes with js-

Issue #2383865 by mgifford, pguillard, rpayanm, alexpott, jhodgdon: Spellchecking Drupal - Javascript

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

Issue #1342198 by nod_, droplet, cosmicdreams, RobLoach, aspilicious: Use .on and .off instead of .bind, .unbind and .delegate.

Issue #1333292 by mgifford: Fixed Screen-reader users receive no info about file upload status / success.

Issue #1749782 by pascalduez: Use event.preventDefault(); and event.stopPropagation(); instead of return false;.

Issue #1037632 by Sheldon Rampton, Tor Arne Thune: Fixed Attaching a forbidden file to a node gives an error message with bogus file path.

Issue #1419968 by nod_, cosmicdreams, droplet, tim.plunkett: Replace $('selector', domelement) with $(domelement).find('selector').