1.6.4

### Improvement: * If a webhook is the loopback address, skip SSL verification @Kukks ### Bug fixes: * Minor checkout UI fix (#4015) @dennisreimann * Greenfield: Update webhook would reset the secret (#4010) @Kukks * Fix crash when BTC network isn't available (#4007) @Kukks * Make InvoicePaymentSettled return correct afterExpiration value (#3966) @Kukks * Greenfield: Allow tagging a transaction even if it hasn't been yet broadcasted @Kukks ### Improvements: * The invoice filter dropdown list labels should be "Settled invoice" rather than "Paid invoice" (#4000 #3573) @BitcoinABee