POS Issue: Basically POS checkout generation is messed up

[hktrib]

It works 1/500 Place Order clicks.

Reproduce from somewhere not POS page to POS, try to buy and item it works. But if you don't leave POS and try to buy again, it doesn't generate checkout.

If you do buy an item, and try to buy it again, it uses the same expired token from before and checkout generation doesn't work.

[daxidngyn]

I can push out a fix that resets the checkout flow when the dialog state is changed (i.e. dialog closed)

However, there is currently no way for the frontend to detect when items are successfully purchased, as we are using Stripe's embedded features. We can't modify state depending on if items were purchased, such as closing the dialog or displaying a toast message.