move fieldtype filter to wagtailadmin_tags

wagtail/wagtailadmin/templates/wagtailadmin/shared/field_as_li.html

@@ -1,4 +1,4 @@
-{% load fieldtype %}
+{% load wagtailadmin_tags %}
 <li class="{{ field.css_classes }} {{ field|fieldtype }} {% if field.errors %}error{% endif %}">
     <div class="field">
         {% if field|fieldtype != "boolean_field" %}{{ field.label_tag }}{% endif %}

wagtail/wagtailadmin/templatetags/fieldtype.py

@@ -1,13 +0,0 @@
-from django import template
-
-from wagtail.wagtailcore.util import camelcase_to_underscore
-
-register = template.Library()
-
-
-@register.filter
-def fieldtype(bound_field):
-    try:
-        return camelcase_to_underscore(bound_field.field.__class__.__name__)
-    except AttributeError:
-        return ""

wagtail/wagtailadmin/templatetags/wagtailadmin_tags.py

@@ -6,6 +6,7 @@ from wagtail.wagtailadmin import hooks
 from wagtail.wagtailadmin.menu import MenuItem
 
 from wagtail.wagtailcore.models import get_navigation_menu_items
+from wagtail.wagtailcore.util import camelcase_to_underscore
 
 from wagtail.wagtailsnippets.permissions import user_can_edit_snippets  # TODO: reorganise into pluggable architecture so that wagtailsnippets registers its own menu item
 
@@ -83,3 +84,11 @@ def ellipsistrim(value, max_length):
             truncd_val = truncd_val[:truncd_val.rfind(" ")]
         return truncd_val + "..."
     return value
+
+
+@register.filter
+def fieldtype(bound_field):
+    try:
+        return camelcase_to_underscore(bound_field.field.__class__.__name__)
+    except AttributeError:
+        return ""