This reverts commit c7a39a16.

That was not meant to be pushed as it prevents EpicEditor from updating
the original textarea.

git authored May 29, 2021 and Henrik Danielsson committed May 29, 2021

- #3191083 by 44sunsets, lily.yan, joey-santiago, alexis_saransig, et al: Update to CKEditor 4.16.1.

Editor contents are now monitored for intentional changes, much like in D8.
Any changes made by the editor itself during attachement to a field will be
reverted unless an intentional change was detected.

Dave Reid authored Feb 10, 2019 and Henrik Danielsson committed Feb 10, 2019

- #2679106 by Dave Reid, Wim Leers, naxoc, Liam Morland: CKEditor uses separate cache-busting query string from Drupal's

This also bumps the verified version range to 4.5.3.