PoS - New Customer window should save customer's address_id upon saving

Using Point of Sale.
When we click for "New Customer" and we write the customer and address details, if an online customer (or another operator) writes at the same time his address from online shop, our address is not saved. Customer is created though.

This happens because customer address gets the id when we open "new customer" window in PoS.
Online customer then writes/finishes his own address saving to the same id.
And when we try to save with this id, we get hidden duplicate address_id error and address is not saved.

You need to change the "new customer" window to find latest address id when we click save and pass-through the problem.