Customization for text fields

[remyroy]

It would be nice to add the ability to customize some of the text fields in the payment settings.

In the order review, there is a field showing: Place order below. Pay with any token on any chain..
In the checkout page, there is a field showing: Continue to payment..

It would be nice to be able to customize both of these text fields, add text or change it, without having to go in the code through the payment settings.

Right now, these text fields are hard coded in:

• pretix-eth-payment-plugin/pretix_eth/templates/pretix_eth/checkout_payment_confirm.html

  Line 28 in a5f3bdc

• pretix-eth-payment-plugin/pretix_eth/templates/pretix_eth/checkout_payment_form.html

  Line 3 in a5f3bdc

  <div class="form-horizontal">

[remyroy]

I believe using Pretix text fields could also add another benefit and enable us to add a translated version for Spanish users for instance.