order activities by last_update

biz/admin.py

@@ -430,11 +430,11 @@ class ProspectGroupAdmin(SyncedObjectAdmin):
 
 @admin.register(Activity)
 class ActivityAdmin(SyncedObjectAdmin):
-    list_display = ('prospect_names', 'creation_date', 'status', 'type', 'description', 'attachment_text', )
+    list_display = ('prospect_names', 'last_update', 'status', 'type', 'description', 'attachment_text', )
     list_filter = ('status', 'type')
     search_fields = ('description',)
     filter_horizontal = ('prospects',)
-    date_hierarchy = 'creation_date'
+    date_hierarchy = 'last_update'
 
     def get_form(self, request, obj=None, **kwargs):
         form = super().get_form(request, obj, **kwargs)