Restrict days for Early Check-in/Late Checkout Upsells

This should be a simple change to add rules to the Early Checkin and Late Checkout upsells to be able to specify certain days when early checkin or late checkout is restricted. For example, for some properties, I wouldn’t want to allow someone to do a late checkout on a Friday since that may be a prime day for new Fri-Sun reservations to come in. In the same way, I wouldn’t want to allow early checkin on a Sunday and then have it block reservations that end on that Sunday.