server shop : auto-remove items once they are used

[CHΞRiF#2328]

TOPIC TITLE: server shop : auto-remove items once they are used

*Suggestion: if there is an option to make the item auto-remove after being used it will stop the abuse of the item

*Reason: people over use the item to give themselves a role over and over even after being removed later ( it happens that i couldn't stop a user from getting infinity giveaway role) 

Images: non

*Username: PIRATΞ ΛLGΞRIΛ#2328

[opachki#8577]

*Addition: make an option to set custom amount of item usability.