back button after transaction successfully sent behaves weirdly

[AndySchroder]

Describe the bug

Pressing the back button after getting to the transaction successfully sent screen does weird stuff, it:

1. Goes back to the invoice details screen asking me if I want to pay the invoice again, then pressing a second time,
2. Starts trying to scan a QR code again, then pressing a third time,
3. Finally returns to the home screen.

I would expect steps 1 and 2 to be skipped and a single back button press return directly to the home screen.

This problem is not new, it has been around for a year or so.

Reproduce

1. Send a payment
2. Press back.

Zeus version

v0.7.6

Node interface

LND (REST)

Network

Clearnet

Device

oneplus

Device operating system

android

Log output

No response

[myxmaster]

I agree it should go back to the screen which was displayed before user opened QR scanner. With #1491 it will not go to QR scanner anymore, but invoice details is still showing up. So this needs another fix.