Changing product of booked appointent doesn't reflect the change in order

[Valentina R]

To reproduce:

• Book an appointment
• edit the appointment by changing the Product to something else
• open the Edit-order and the Product is not changed

But in case you make changes to the time, those are reflected in the edit-order.

Reported here.

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[Željan Topić]

Fixed with 4.8.19