### Godot version

Master, commit 37d1dfef9d81aade2

### System information

PopOs 22.04, any renderer, Gnome, X11

### Issue description

When exporting a scene to GLTF, the new file does not show up in the filesystem tree, until a new file or folder is created.


https://github.com/godotengine/godot/assets/3624853/ede88d50-f93d-4487-913f-1d87bbd8a7bb

Granted, this is not a very common case. But still, the behavior might seem strange and confusing. It gives the impression that the export did not work.

### Steps to reproduce

- Open any 3D scene and export it to GLTF by going to `Scene > Export to ... > gLTF2.0 Scene`
- Set the file path to your `res://` folder
- The file does not show up
- Create a new folder in the FileSystem tree. This will update the tree and your GLTF file will show up then.

### Minimal reproduction project

No need.
Just export any 3D scene to GLTF.
return "ConvertGLTF2";
}
bool SceneExporterGLTFPlugin::has_main_screen() const {
	return false;
}
SceneExporterGLTFPlugin::SceneExporterGLTFPlugin() {
	file_export_lib = memnew(EditorFileDialog);
	EditorNode::get_singleton()->get_gui_base()->add_child(file_export_lib);
	file_export_lib->connect("file_selected", callable_mp(this, &SceneExporterGLTFPlugin::_gltf2_dialog_action));
	file_export_lib->set_title(TTR("Export Library"));
	file_export_lib->set_file_mode(EditorFileDialog::FILE_MODE_SAVE_FILE);
	file_export_lib->set_access(EditorFileDialog::ACCESS_FILESYSTEM);
	file_export_lib->clear_filters();
	file_export_lib->add_filter("*.glb");
	file_export_lib->add_filter("*.gltf");
	file_export_lib->set_title(TTR("Export Scene to glTF 2.0 File"));
	PopupMenu *menu = get_export_as_menu();
	int idx = menu->get_item_count();
	menu->add_item(TTR("glTF 2.0 Scene..."));
	menu->set_item_metadata(idx, callable_mp(this, &SceneExporterGLTFPlugin::convert_scene_to_gltf2));
}
void SceneExporterGLTFPlugin::_gltf2_dialog_action(String p_file) {