Accidentally adding on to tabs

[sde1000]

A fairly common pattern seems to be:

• Customer starts a tab.
• Staff member adds the customer's name to the tab.
• Staff member fails to use "Recall Transaction / Hide current transaction"
• Staff member goes back to the till and adds items for another customer
• Customer pays for previous customer's tab plus their own transaction
• Staff member has to refund original tab and start again

Can we add a prompt that a tab may not have been hidden correctly? We would be looking for:

• A transaction with a note
• Has been recalled implicitly by a staff member tapping in, not explicitly with Recall Transaction
• It's been more than a couple of minutes

This might save us some Square fees!

[sde1000]

Actually, we can make it simpler than this. We want to warn the user when they tap in to an open transaction of any type that is more than a few minutes old.

There's a pattern we keep seeing where people forget to record SumUp payments in the till, and leave the transaction open. When they return to it later they typically add new items, notice there was an existing item at the start, and just void the existing item rather than record the SumUp payment against it correctly.