title: Radio button for django inline formset
body: <p>What I need is a radio button for each of the form in the below given formset.</p>
  
  <pre><code>class AppvideoDemoForm(forms.ModelForm):
  
      class Meta:
          model = AppvideoDemo
  
      def __init__ (self, *args, **kwargs):
          super(AppvideoDemoForm, self).__init__(*args, **kwargs)
          self.fields['active'] = forms.BooleanField( widget = forms.RadioSelect(choices=((self.prefix, 'Set this as primary'),)))
  
      def add_prefix(self, field):
          if field == 'active': 
              return field
          else:
              return self.prefix and ('%s-%s' % (self.prefix, field)) or field
  
  AppvideoDemoFormSet = inlineformset_factory(Applications, AppvideoDemo, extra=3,form=AppvideoDemoForm,formset=MandatoryInlineFormSet, can_delete=False)
  </code></pre>
  
  <p>But the radio buttons were found to be unselectable and multi-selectable when i tried my own ways.</p>