settings: define form rendrer allowing widgets templates override (#54675)

src/authentic2/settings.py

@@ -153,6 +153,7 @@ INSTALLED_APPS = (
     'xstatic.pkg.jquery',
     'xstatic.pkg.jquery_ui',
     'xstatic.pkg.select2',
+    'django.forms',
 )
 
 INSTALLED_APPS = tuple(plugins.register_plugins_installed_apps(INSTALLED_APPS))
@@ -351,6 +352,8 @@ DJANGO_RBAC_PERMISSIONS_HIERARCHY = {
     'manage_authorizations': ['view', 'search'],
 }
 
+FORM_RENDERER = 'django.forms.renderers.TemplatesSetting'
+
 SILENCED_SYSTEM_CHECKS = ["auth.W004"]
 
 # Get select2 from local copy.