Previously notifications were displayed too for down on the page.
This caused layout issues where the editor disappeared.

related: quiqqer/ckeditor4#30

Rechtschreibfehler behoben in der Datei UploadWindow.js

See merge request !1

fix: Disable the plugins autoembed and embedbase due to a recent breaking chage, which requires configuration to make those plugins work properly. Closes #22 and see #24