Lock: Remove User Code - needs a way to allow clearing the same value, or resetting itself.

[danielbrunt57]

Currently, if you have a user code in say slot 4, you can Remove User Code = 4 via OZW Admin System Values but you cannot do the same thing again if the slot number remains unchanged. You could first clear slot 0, then clearing slot 4 will work again. The routine needs a way to allow re-clearing the same slot number possibly by somehow resetting itself after a slot was cleared.