Use OrderedDict for plugin-generated forms

src/pretix/plugins/banktransfer/payment.py

@@ -1,10 +1,17 @@
-from pretix.base.payment import BasePaymentProvider
+from collections import OrderedDict
 from django.utils.translation import ugettext_lazy as _
+from django import forms
+
+from pretix.base.payment import BasePaymentProvider
 
 
 class BankTransfer(BasePaymentProvider):
     identifier = 'banktransfer'
     verbose_name = _('Bank transfer')
-    settings_form_fields = {
-
-    }
+    settings_form_fields = OrderedDict([
+        ('bank_details',
+         forms.CharField(
+             widget=forms.Textarea,
+             label=_('Bank account details')
+         ))
+    ])