~~~~~~~~~~~~~~~~~~
* `iommi.forms.save_nested_form` added. This is useful for when you want to save multiple forms with one submit button.
* Fixed admin defaults to have lower priority so you can properly override them.
* Added dummy factory registration to not crash on `GenericRelation` and `GenericForeignKey`
* Forms: check `model.validate_constraints()` on Django 4.1+ (Thanks Yury Bulka!)
* Enable users to disable full form state sending on select2 ajax. To disable, set the `data-select2-full-state` attribute to `false` on the form.