### 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
if (updating) {
		return;
	}
	
	
	String current = _get_current();
	if (!current.is_empty()) {
		player->set_assigned_animation(current);
		Ref<Animation> anim = player->get_animation(current);
		{
			bool animation_library_is_foreign = EditorNode::get_singleton()->is_resource_read_only(anim);
			track_editor->set_animation(anim, animation_library_is_foreign);
			Node *root = player->get_node(player->get_root());
			if (root) {
				track_editor->set_root(root);
			}
		}
		frame->set_max((double)anim->get_length());
	} else {
		track_editor->set_animation(Ref<Animation>(), true);
		track_editor->set_root(nullptr);
	}
	autoplay->set_pressed(current == player->get_autoplay());
	AnimationPlayerEditor::get_singleton()->get_track_editor()->update_keying();
	_animation_key_editor_seek(timeline_position, false);
	emit_signal("animation_selected", current);
}
void AnimationPlayerEditor::_animation_new() {