Fix bug that prevented use of `to_field` kwarg on select2 ForeignKey
Fix bug that prevented use of `to_field` kwarg on select2 ForeignKey

sandow-digital/django-select2-forms,hkmshb/django-select2-forms,SpectralAngel/django-select2-forms,JP-Ellis/django-select2-forms,hkmshb/django-select2-forms,hkmshb/django-select2-forms,SpectralAngel/django-select2-forms,sandow-digital/django-select2-forms,SpectralAngel/django-select2-forms,sandow-digital/django-select2-forms