Allow resetting QR code after a successful payment

[Klakurka]

How about having the 'Pay with XEC' button stay, but just change the text to something like 'Send Another Payment' (or whatever they have set for their button text).

[Klakurka]

We'll want to make sure that the div heights all line up before and after the payment is received. Right now the div shrinks a bit because of the missing button after the payment has been received.

[Klakurka]

Have this actually occur on the auto-close timer.