IBAN validation for SEPA account

[ghost]

Fixes bisq-network/growth#241
Superseds #5419

Changes:

• when user type valid IBAN address but from country outside SEPA zone (f.e. Georgia) he see validation error: SEPA is not supported in this country
• when user type valid SEPA zone IBAN country of bank is automatically updated
• when user switch country of bank to value that doesn't match IBAN he see validation error: Country code invalid below IBAN field

[alkum]

Reviewed, could confirm all changes except the last one:

when user switch country of bank to value that doesn't match IBAN he see validation error: Country code must match country of bank below IBAN field

That error is indeed shown, but ignored. A SEPA account can still be created, despite this error being shown.

(With the other error, SEPA is not supported in this country, the account cannot be created. The "Save New Account" button is disabled while the error is shown, re-enabled when error is fixed.)

Tested using sample IBANs from https://www.iban.com/structure

[ghost]

@alkum Thanks - please check now.

Also please wait with merge - I'll adapt Sepa Instant Form once everything will be okay on standard Sepa

[alkum]

Checked again, validation works for standard SEPA accounts.

[ripcurlx]

Is there a reason why you introduce another listener to the textProperty?

[ghost]

Not actually - I merged those listeners into one.

Listener is not added directly after ibanInputTextField declaration because it needs countryComboBox

[ripcurlx]

utACK - Remaining code changes are looking fine. utACK also based on #6107 (comment)