Move meta_description filter to wagtailadmin_tags

wagtail/wagtailadmin/templates/wagtailadmin/pages/add_subpage.html

@@ -1,6 +1,6 @@
 {% extends "wagtailadmin/base.html" %}
 {% load i18n %}
-{% load meta_description %}
+{% load wagtailadmin_tags %}
 
 {% block bodyclass %}menu-explorer{% endblock %}
 {% block titletag %}{% blocktrans with title=parent_page.title %}Create a page in {{ title }}{% endblocktrans %}{% endblock %}

wagtail/wagtailadmin/templatetags/meta_description.py

@@ -1,11 +0,0 @@
-from django import template
-
-register = template.Library()
-
-
-@register.filter
-def meta_description(model):
-    try:
-        return model.model_class()._meta.description
-    except:
-        return ""

wagtail/wagtailadmin/templatetags/wagtailadmin_tags.py

@@ -92,3 +92,11 @@ def fieldtype(bound_field):
         return camelcase_to_underscore(bound_field.field.__class__.__name__)
     except AttributeError:
         return ""
+
+
+@register.filter
+def meta_description(model):
+    try:
+        return model.model_class()._meta.description
+    except:
+        return ""