Issue #3260032 by longwave, bnjmnm, Wim Leers, samuel.mortenson: CKEditor 5...
Issue #3260032 by longwave, bnjmnm, Wim Leers, samuel.mortenson: CKEditor 5 adds ie11.user.warnings library to every page, triggering a FOUC even for anonymous users
(cherry picked from commit 77657fb6)