fix: restore per-item retrieval settings in the model editor knowledge section (#27686)

src/lib/components/common/Modal.svelte

@@ -107,7 +107,7 @@
 		if (focusTrap) {
 			focusTrap.deactivate();
 		}
-		if (modalElement) {
+		if (modalElement && modalElement.parentNode === document.body) {
 			document.body.removeChild(modalElement);
 		}
 	});