ISTWCMS-4602 Add fix 404 pages to site management menu

uw_cfg_common.links.menu.yml

@@ -322,6 +322,12 @@ uw_site_management.content_access:
   url: internal:/admin/content-access
   weight: 0
 
+uw_site_management.fix_404_pages:
+  title: 'Fix 404 pages'
+  menu_name: uw-menu-site-management
+  url: internal:/admin/config/search/redirect/404
+  weight: 0
+
 uw_site_management.menus:
   title: 'Menus'
   menu_name: uw-menu-site-management