fix table cell CSS so that the 'choose another page' button displays in full

wagtail/wagtailusers/static_src/wagtailusers/scss/groups_edit.scss

@@ -14,3 +14,9 @@
         font-size: 2.5em !important;
     }
 }
+
+.page-permissions-listing {
+    .admin_page_chooser .field-content {
+        width: 100%;  // so that 'choose another page' button displays in its entirety
+    }
+}

wagtail/wagtailusers/templates/wagtailusers/groups/includes/page_permissions_formset.html

@@ -11,7 +11,7 @@
     </p>
 {% endif %}
 
-<table class="listing">
+<table class="listing page-permissions-listing">
     <col />
     {% for i in formset.permission_types %}
         <col width="15%" />