Option to send done to trash
If you mark your shopping list items as done, why not delete them automaticly in a set period?
I don't really use the done.. So i came up with idea: from settings you can eneable an option, what will result in deleting all marked as done. What point on that, also if wanted, each list can be selected as "do not delete done" or etc. or you could also select on each to-do.