isort 5.0 config/docs (#1736)

src/pretix/control/forms/__init__.py

@@ -10,6 +10,7 @@ from django.forms.utils import from_current_timezone
 from django.utils.translation import gettext_lazy as _
 
 from ...base.forms import I18nModelForm
+
 # Import for backwards compatibility with okd import paths
 from ...base.forms.widgets import (  # noqa
     DatePickerWidget, SplitDateTimePickerWidget, TimePickerWidget,

src/pretix/control/forms/event.py

@@ -1,3 +1,5 @@
+from urllib.parse import urlencode, urlparse
+
 from django import forms
 from django.conf import settings
 from django.core.exceptions import ValidationError
@@ -15,7 +17,6 @@ from i18nfield.forms import (
     I18nForm, I18nFormField, I18nFormSetMixin, I18nTextarea, I18nTextInput,
 )
 from pytz import common_timezones, timezone
-from urllib.parse import urlencode, urlparse
 
 from pretix.base.channels import get_all_sales_channels
 from pretix.base.email import get_available_placeholders