Adjust timing of unused slot expiration

I'd like to see the unused slot expiration adjusted slightly so that the slot expires on the day of the week it's assigned to, instead of the current system of "depends on various factors". I will go to re-use a set of slots from a route I closed just a few hours ago and they will show as still available, but no sooner do I schedule the new flight and the slots for the next two days expire because they haven't flown yet because they're for Thursday and Friday and it's currently Wednesday. It was not possible for them to fly between the time I scheduled them and the time the game decided to expire them. This creates a lot of extra unnecessary work going through and editing those flights *again* just to buy the slots I already had for them. I'd rather they already expired the previous Th/Fr so they'd get bought new when I created the new flight, and not show as available when it's not possible to use them before expiring.