Explicit is better than implicit

microcms/admin.py

@@ -31,9 +31,8 @@ class PageAdmin(FlatPageAdmin):
     list_display = ('url', 'title', 'pub_date', 'modified_date',
                     'enable_comments', 'author')
     list_display_links = ('url', 'title')
-    list_filter = FlatPageAdmin.list_filter + ('author',
-                                               'pub_date',
-                                               'modified_date')
+    list_filter = ('sites', 'enable_comments', 'registration_required',
+                   'author', 'pub_date', 'modified_date')
     fieldsets = (
         (None, {'fields': ('url', 'title', 'content')}),
         (_('Extra'),