build: narrow ckeditor/ckeditor version constraint

See merge request !10

Versions above 4.22.1 are LTS and no longer free.
Versions below 4.16.0 may not work correctly.

fix: display CKE notifications on the center of the page

See merge request !8

feat: #35

fix: prevent & conversion in text mode

See merge request !7

fix: adds en lang file to qui-font-awesome plugin

See merge request !5

fix: no longer create backup of plugins on setup

See merge request !4

fix: min height for editor

See merge request !3

feat: Brick edit button at the WYSIWYG Brick Window

See merge request !2