fix menu iterator

elections/templates/elections/elections_contact_page.html

-{% extends "styleguide2/contact_page.html" with show_regional_contacts=True %}
+{% include "styleguide2/contact_page.html" with show_regional_contacts=True %}

main/templates/main/main_contact_page.html

-{% extends "styleguide2/contact_page.html" with show_regional_contacts=True %}
+{% include "styleguide2/contact_page.html" with show_regional_contacts=True %}

shared/models/main.py

@@ -247,7 +247,13 @@ class PageInMenuMixin(Page):
             else parent_instance
         )
 
-        for menu in instance.root_page.menu:
+        menu_iterator = (
+            instance.root_page.menu
+            if hasattr(instance, "root_page")
+            else instance.menu
+        )
+
+        for menu in menu_iterator:
             if menu.block_type == "menu_item":
                 if menu.value["page"] is None:
                     continue