qml: qeinvoice: fix regression in update_userinfo
follow-up 3b0cdef871
```
29.60 | E | lnworker.LNWallet.[test_segwit_2] | Exception in pay_invoice: TypeError("unhashable type: 'list'")
Traceback (most recent call last):
File "/home/user/wspace/electrum/electrum/util.py", line 1153, in wrapper
return await func(*args, **kwargs)
File "/home/user/wspace/electrum/electrum/lnworker.py", line 1518, in pay_invoice
self.set_invoice_status(key, PR_INFLIGHT)
File "/home/user/wspace/electrum/electrum/lnworker.py", line 2404, in set_invoice_status
util.trigger_callback('invoice_status', self.wallet, key, status)
File "/home/user/wspace/electrum/electrum/util.py", line 1796, in trigger_callback
callback(*args)
File "/home/user/wspace/electrum/electrum/gui/qml/qeinvoice.py", line 90, in on_event_invoice_status
self.update_userinfo()
File "/home/user/wspace/electrum/electrum/gui/qml/qeinvoice.py", line 327, in update_userinfo
self.userinfo = userinfo_for_invoice_status([self.status])
File "/home/user/wspace/electrum/electrum/gui/qml/qeinvoice.py", line 305, in userinfo_for_invoice_status
return {
TypeError: unhashable type: 'list'
```
e35b715ed8