Added array to store canvas_ids. Update and save in addCanvas().
Created setCurrentCanvas(id).
Added method stubs for next/previous canvas navbuttons.
Call addCanvas() to create blank state app.
Lookup next canvas id on "Next" click and call stub loadCanvas(id) method.
Added canvas indicator (#x of #y)
Connected load previous canvas button.
Deleted old log message.
Repurpose loadState() as loadCanvas(id).
Added missing next_canvas_id restore.