BUG: The option 'cancel changes' within Versioning menu opens up direct and not in popup

[svandeneertwegh]

Small bug.

When clicking on 'Cancel changes' here in NL translation it opens direct and not in a popup.

This issue found with the following setup:

django-cms==4.1.0rc3
djangocms-versioning==2.0.0rc1
djangocms-alias==2.0.0rc1

[fsbraun]

@svandeneertwegh Can I interest you in creating a PR? :-)