### 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
cidx++;
	}
	
	RS::get_singleton()->viewport_set_parent_viewport(root_vp, RID());
	RS::get_singleton()->viewport_attach_to_screen(root_vp, root_vp_screen_rect);
	RS::get_singleton()->viewport_set_update_mode(root_vp, RS::VIEWPORT_UPDATE_WHEN_VISIBLE);
	
	
	
	player->seek(cpos, false);
	values_backup->restore();
	
	if (Node3DEditor::get_singleton()->is_visible()) {
		
		Node3DEditor::get_singleton()->set_state(spatial_edit_state);
	} else { 
		
		CanvasItemEditor::get_singleton()->set_state(canvas_edit_state);
	}
	
	onion.can_overlay = true;
	plugin->update_overlays();
}
void AnimationPlayerEditor::_start_onion_skinning() {
	
	if (!get_tree()->is_connected("process_frame", callable_mp(this, &AnimationPlayerEditor::_prepare_onion_layers_1_deferred))) {
		get_tree()->connect("process_frame", callable_mp(this, &AnimationPlayerEditor::_prepare_onion_layers_1_deferred));
	}
}
void AnimationPlayerEditor::_stop_onion_skinning() {