### Godot version

4.0 fb10f45

### System information

Windows 10 x64

### Issue description

Behold, empty TileSet editor, with no TileMap node nor bottom button visible:
![image](https://github.com/godotengine/godot/assets/2223172/0f052770-4946-40eb-a790-a995dbe2599c)
Regression from #72277 (most likely, I didn't test)

### Steps to reproduce

1. Add some Node to your scene
2. Add a TileMap as a child
3. Select TileMap
4. Fold its parent in the scene tree
5. Restart the editor
6. The TileMap selection is restored and so is the folded node, resulting in a weird paradox

### Minimal reproduction project

N/A
String current;
	if (animation->get_selected() >= 0 && animation->get_selected() < animation->get_item_count() && !animation->is_item_separator(animation->get_selected())) {
		current = animation->get_item_text(animation->get_selected());
	}
	return current;
}
void AnimationPlayerEditor::_play_bw_pressed() {
	String current = _get_current();
	if (!current.is_empty()) {
		if (current == player->get_assigned_animation()) {
			player->stop(); 
		}
		ERR_FAIL_COND_EDMSG(!_validate_tracks(player->get_animation(current)), "Animation tracks may have any invalid key, abort playing.");
		player->play_backwards(current);
	}
	
	stop->set_icon(pause_icon);
}
void AnimationPlayerEditor::_play_bw_from_pressed() {