django-admin-sortable2 breaks client-side form validation

[phihag]

When django-admin-sortable2 is used on a form, it breaks all client-side form validation of that form in the admin interface.

Removing it doesn't seem to impact the sortability function. It's not django-admin-sortable2's form to modify in the first place.

I believe this line is to blame.

[jrief]

You're right!
I don't remember why I did this. I will try it without this line.