add hint for bank transfer duration

pass/lang/en/checkout.json

@@ -20,6 +20,7 @@
     },
     "prepay": {
       "name": "Bank transfer",
+      "duration": "Hint: Bank transfers can take up to one or two bank working days to be processed. If you want your order being processed immediately please consider another payment method.",
       "email": {
         "label": "E-mail address",
         "description": "To this address you will be sent one-time information about our bank details and a notification when the payment is completed."
@@ -72,4 +73,4 @@
     "submit": "Make payment",
     "loading": "Payment method is loaded"
   }
-}
+}
\ No newline at end of file

pass/views/checkout/micropayment.ejs

@@ -5,6 +5,7 @@
       <label for="email"><%= req.t("payments.prepay.email.label", {ns: "checkout"}) _%></label>
       <input type="email" name="email" id="email" placeholder="max@mustermann.de" required autofocus>
       <div><%= req.t("payments.prepay.email.description", {ns: "checkout"}) _%></div>
+      <div><%= req.t("payments.prepay.duration", {ns: "checkout", escapeInterpolation: false}) _%></div>
     </div>
     <%_ } _%>
     <%- include("../templates/revocation") -%>