code: def admin_dropdown_menu(context):
      
      template_vars = context.flatten()
      user = context["request"].user
      if user.is_staff:
          template_vars["dropdown_menu_app_list"] = admin_app_list(
              context["request"])
          if user.is_superuser:
              sites = Site.objects.all()
          else:
              try:
                  sites = user.sitepermissions.sites.all()
              except ObjectDoesNotExist:
                  sites = Site.objects.none()
          template_vars["dropdown_menu_sites"] = list(sites)
          template_vars["dropdown_menu_selected_site_id"] = current_site_id()
          template_vars["settings"] = context["settings"]
          template_vars["request"] = context["request"]
          return template_vars
docs: Renders the app list for the admin dropdown menu navigation.