After deleting a graph and restarting napkin, all its objects will reappear after restarting napkin.
- Create a nap::audio::Graph and fill it with a number of objects A, B, C etc.
- Delete the graph (right click>Delete). Now the graph is gone.
- Close napkin and reopen napkin. Now the graph is still gone, but the objects A, B, C etc have appeared as separate resources in the list.