Update TODO
Add an isk_amount_label to ease the display of ISK values. Auto-divides by 1 mil if necessary.
Use isk_amount_label in planet stats widget and transfer quantity dialog.
Update TODO.
Verify link CPU and PG usage values after some in-game research. Update tests and model accordingly.
Add notes about researched transfer volume.
Split base_import_export_cost out into import_cost and export_cost.
Split base_import_export_cost_for_quantity out into import_cost_for_quantity and export_cost_for_quantity.
Add tests for each.
Add methods to customs office asking it for the cost of a given product import or export.
Update the select quantity dialog to use the new import/export cost methods.
Expand the stored_products windows to at least ~3 rows (100 px) by default.
Don't let the user transfer products from one building to itself. That's silly.