old_contents: from django.utils.decorators import method_decorator
  from corehq.apps.hqwebapp.views import BaseSectionPageView
  from corehq.apps.style.decorators import use_bootstrap3
  
  
  class BaseB3SectionPageView(BaseSectionPageView):
      """Subclass of BaseSectionPageView to immediately support Bootstrap3.
      """
  
      @use_bootstrap3
      def dispatch(self, request, *args, **kwargs):
          return super(BaseB3SectionPageView, self).dispatch(request, *args, **kwargs)
  
new_contents: from django.utils.decorators import method_decorator
  from corehq.apps.hqwebapp.views import BaseSectionPageView
  from corehq.apps.style.decorators import use_bootstrap3
  
  
  class BaseB3SectionPageView(BaseSectionPageView):
      """Subclass of BaseSectionPageView to immediately support Bootstrap3.
      """
      template_name = "style/bootstrap3/base_section.html"
  
      @use_bootstrap3
      def dispatch(self, request, *args, **kwargs):
          return super(BaseB3SectionPageView, self).dispatch(request, *args, **kwargs)
  
subject: update base template