Support for "non 3-letter currency codes"

[mjkeaton]

There is an error parsing displaying tokens with "unit" not complying with ISO 4217 3-letter codes, e.g. mlsat.
Apparently NumberFormat does not like it.. hence it is not displaying the amount in the "Receive ecash" dialog.

As far as I am aware, NUTs do not define the type of "unit" other than for it to be a string, right?
Should "non 3-letter currency codes" be supported, e.g. "mlsat" (.length > 3) or "$" (.length < 3) ?

RangeError: invalid currency code in NumberFormat(): mlsat
    formatCurrency https://wallet.cashu.me/assets/base.bb67c1f5.js:1
    displayUnit https://wallet.cashu.me/assets/WalletPage.240f3745.js:1

Any chance the amount can still be displayed?

With "mlsat" currency:

With "sat" currency: