Move ActiveFilter to wagtail.admin.active_filters

wagtail/admin/active_filters.py

@@ -0,0 +1,6 @@
+from collections import namedtuple
+
+# Represents a django-filter filter that is currently in force on a listing queryset
+ActiveFilter = namedtuple(
+    "ActiveFilter", ["auto_id", "field_label", "value", "removed_filter_url"]
+)

wagtail/admin/views/generic/base.py

@@ -1,5 +1,4 @@
 import warnings
-from collections import namedtuple
 
 from django.contrib.admin.utils import quote, unquote
 from django.core.exceptions import ImproperlyConfigured
@@ -22,6 +21,7 @@ from django_filters.filters import (
 )
 
 from wagtail.admin import messages
+from wagtail.admin.filters import ActiveFilter
 from wagtail.admin.forms.search import SearchForm
 from wagtail.admin.paginator import WagtailPaginator
 from wagtail.admin.ui.tables import Column, Table
@@ -192,12 +192,6 @@ class BaseOperationView(BaseObjectMixin, View):
         return redirect(self.get_success_url())
 
 
-# Represents a django-filters filter that is currently in force on a listing queryset
-ActiveFilter = namedtuple(
-    "ActiveFilter", ["auto_id", "field_label", "value", "removed_filter_url"]
-)
-
-
 class BaseListingView(WagtailAdminTemplateMixin, BaseListView):
     template_name = "wagtailadmin/generic/listing.html"
     results_template_name = "wagtailadmin/generic/listing_results.html"