Manually Mark a Shipment as Delivered

[PianoShipping]

We often have instances where UPS doesn't update their system properly and one of our shipments remains as in progress indefinitely because we can't mark the shipment as delivered Manually.  Please fix it so that we can mark a shipment as delivered manually once we know it has been delivered, but the UPS system says it's still in progress.  It's very, very annoying that we have orders in our "shipments" tab when we know they've been delivered.

Thank you.