JavaScript error in toolbar.js when using paragraphs_edit frontend editing

Attached patch fixes the issue for us.

Confirming this issue present in other places when modals are fired. In my case on the backend (no front end editing) and firing the paragraphs entity embed modal. MR!12748 resolves the issue.

Marking RTBC however I'm unsure of whether the tests failing are caused by upstead 11.x issues or something in the merge request.

I'd rather use conditional chaining for this.

      document
        .querySelector('#toolbar-administration')
        ?.classList.add('toolbar-oriented');

Done.

Feedback appears to be addressed