Full screen blocks all dialogs

Hi Stephen,

Thank you for bringing this to our attention.
Indeed, the Drupal UI dialogs have lower z-index than fullscreen.
I've pushed a patch with added css rule to make Drupal UI dialogs visible when using fullscreen.
Works with Claro and Gin.

Works like a charm thanks!

Released in 1.4.1

In the release notes to ckeditor5_plugin_pack: 1.4.1 it says ckeditor5_plugin_pack_fullscreen replaces ckeditor5_premium_features_fullscreen and in 'Extend' ckeditor5_plugin_pack_fullscreen is shown as ‘CKEditor 5 Full-screen Mode (legacy) (Deprecated)'

If you uninstall the old one the 'Text formats and editors' page 'Toolbar configuration' fails to show icons

Steps to reproduce:
drush pm-uninstall ckeditor5_premium_features_fullscreen

Go to /admin/config/content/formats/manage/full_html and in the 'Available buttons' field the text is shown '{"undo":{"label":"Undo"},"redo":{"label":"Redo"},....' not the rendered buttons.

In the browser Console:
'Uncaught TypeError: can't access property "id", [].find(...) is undefined' ckeditor5.admin.js:566:48
This is web/core/modules/ckeditor5/js/ckeditor5.admin.js

Enabling the new fullscreen plugin does not help.

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