Adding this field to the bank journal's form view had been done to ease encoding; yet more fields were left to be set on the related res.partner.bank object (l10n_ch_qr_iban, chf and eur subrscription numbers. In the end, to be consistent, we would have needed to do related fields for all of them as well on the journal. This would have put too many advanced features in a single screen. Instead, we just consider the whole setup needs to be done directly on the res.partner.bank.
Task 2412391
oco-odoo
b27e3e12b9