follow-up 719b468eee
Traceback (most recent call last):
File "...\electrum\electrum\gui\qt\request_list.py", line 111, in item_changed
self.receive_tab.update_current_request()
File "...\electrum\electrum\gui\qt\receive_tab.py", line 227, in update_current_request
lnaddr = self.wallet.get_bolt11_invoice(req) if not help_texts.ln_is_error else ''
File "...\electrum\electrum\wallet.py", line 2515, in get_bolt11_invoice
amount_msat = req.amount_msat if req.amount_msat > 0 else None
TypeError: '>' not supported between instances of 'NoneType' and 'int'
(this somehow escaped attention before, as most objects usually don't have multiple instances,
unless multiple wallets are open at the same time.)
Also, move all signal declarations, class constants and variables to the top of class definitions.
