e7ebf5d950
To reproduce, open two wizards in parallel. Use one to enter the flow and start creating a wallet, then physically unplug the hw device at the correct time, and use the other wizard to trigger a rescan. The rescan will unpair the hw device, resulting in device_manager.client_by_id to return None when continuing the flow on the first wizard. fixes https://github.com/spesmilo/electrum/issues/8858