3564856 Fix ckeditor5_premium_features_fullscreen_uninstall to not require...

Wojciech Kukowskirequested to merge
issue/ckeditor5_premium_features-3564856:3564856-fullscreen-unintall-bug into 1.6.x

3564856 Fix ckeditor5_premium_features_fullscreen_uninstall to not require main module to be enabled

Closes #3564856

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