Account upgrade page stripe checkout is not explicit enough about currency being charged

[Xon]

Affected version

2.3.7

When charging a user for an account upgrade, just the currency symbol is used. For $, this isn't actually accurate enough to determine which currency is being used.

For example; AUD, NZD, and USD all use $ which just shows up as pay $xx.yy via the stripe payment option.

 

[Xon]

In the payment_initiate_stripe template;

<xf:submitrow icon="payment" submit="{{ phrase('pay_x', {'cost': $purchase.cost|currency($purchase.currency)}) }}" />

Maybe the currency() method should append the 3-letter currency name?