Database Order Summary to Have Last Updated

[bhsmither]

Feature Request:

Add a new column to CubeCart_order_summary named updated so that a list of orders can be sorted by "Updated" -- meaning, orders that were edited in any way could be sorted to the top of the list. (The admin activity log should also log the cart_order_id or id of the order summary that was edited.)

[abrookbanks]

Greta suggestion and simple. Thanks.