def admin_edit
      return if !user_is_allowed('products', 'edit')
      @product = Product.find(params[:product_id])
      @modification = Modification.find(params[:mod_id])
      @modification_value_input_field = ModificationValueInputField.find(params[:id])
      render :layout => 'caboose/modal'
    end
def admin_edit
      return if !user_is_allowed('products', 'edit')
      @product = Product.find(params[:product_id])
      @modification = Modification.find(params[:mod_id])
      @modification_value_input_field = ModificationValueInputField.find(params[:id])
      render :layout => 'caboose/modal'
    end
GET /admin/products/:product_id/modifications/:mod_id/values/:mod_value_id/input-fields/:id