Fix saving subresources of nodes

scene/resources/packed_scene.cpp

@@ -2209,7 +2209,7 @@ void PackedScene::_bind_methods() {
 	ClassDB::bind_method(D_METHOD("_get_bundled_scene"), &PackedScene::_get_bundled_scene);
 	ClassDB::bind_method(D_METHOD("get_state"), &PackedScene::get_state);
 
-	ADD_PROPERTY(PropertyInfo(Variant::DICTIONARY, "_bundled", PROPERTY_HINT_NONE, "", PROPERTY_USAGE_INTERNAL), "_set_bundled_scene", "_get_bundled_scene");
+	ADD_PROPERTY(PropertyInfo(Variant::DICTIONARY, "_bundled", PROPERTY_HINT_NONE, "", PROPERTY_USAGE_STORAGE | PROPERTY_USAGE_INTERNAL), "_set_bundled_scene", "_get_bundled_scene");
 
 	BIND_ENUM_CONSTANT(GEN_EDIT_STATE_DISABLED);
 	BIND_ENUM_CONSTANT(GEN_EDIT_STATE_INSTANCE);