- Terminology: use 'invoices' for outgoing payments, 'requests' for incoming payments
- At the GUI level, try to handle invoices in a generic way.
- Display ongoing payments in send tab.
- create unique instances of channels_dialog and addresses_dialog
- display and refresh balances in channels_dialog
- improve formatting of tx history
- repurpose left button in receive_tab
- All requests have an expiration date
- Paid requests are automatically removed from the list
- Unpaid, unconfirmed and expired requests are displayed
- Fix a bug in get_payment_status, conf was off by one
Previously "proxy" would only get updated when closing and reopening
the network dialog. "server" would only get updated after successful
connection establishment to specified server.
