Leave out the page type filter from flat page listings by default

wagtail/admin/views/pages/listing.py

@@ -68,11 +68,6 @@ class EditedByFilter(MultipleUserFilter):
 
 
 class PageFilterSet(WagtailFilterSet):
-    content_type = MultipleContentTypeFilter(
-        label=_("Page type"),
-        queryset=lambda request: get_page_content_types(include_base_page_type=False),
-        widget=CheckboxSelectMultiple,
-    )
     latest_revision_created_at = DateFromToRangeFilter(
         label=_("Date updated"),
         widget=DateRangePickerWidget,
@@ -120,6 +115,14 @@ class PageFilterSet(WagtailFilterSet):
         fields = []  # only needed for filters being generated automatically
 
 
+class ExplorablePageFilterSet(PageFilterSet):
+    content_type = MultipleContentTypeFilter(
+        label=_("Page type"),
+        queryset=lambda request: get_page_content_types(include_base_page_type=False),
+        widget=CheckboxSelectMultiple,
+    )
+
+
 class IndexView(generic.IndexView):
     template_name = "wagtailadmin/pages/index.html"
     results_template_name = "wagtailadmin/pages/index_results.html"
@@ -308,6 +311,7 @@ class ExplorableIndexView(IndexView):
     index_url_name = "wagtailadmin_explore"
     index_results_url_name = "wagtailadmin_explore_results"
     page_title = _("Exploring")
+    filterset_class = ExplorablePageFilterSet
 
     columns = (
         IndexView.columns[0:3]