Answer
Query the PRES_OBJECT_DESCRIPTION_TAB table directly, filtering WHERE po_id = '<form_name>' — the returned description typically corresponds to the window's actual displayed title, letting you correctly map an internal form name back to its user-facing screen name, and from there its Navigator location, even when a Navigator search by name doesn't lead you to the right place. This approach reliably covers most standard objects, though it may not fully cover custom menus nested specifically inside tabs.