Show Subevent start time in select2-pickers (#1630)

* Add Subevent time to __str__

* Show subevent-dates in select2 picker

* Show event-dateblock (if enabled) on Widget Voucher redemption page

* Update src/pretix/base/models/event.py

Co-Authored-By: Raphael Michel <michel@rami.io>

* Update src/pretix/control/templates/pretixcontrol/vouchers/index.html

Co-Authored-By: Raphael Michel <michel@rami.io>

* Update src/pretix/control/views/typeahead.py

Co-Authored-By: Raphael Michel <michel@rami.io>

* Remove date-block on non-subevent voucher redemption pages

Co-authored-by: Raphael Michel <michel@rami.io>

src/pretix/base/models/event.py

@@ -15,6 +15,7 @@ from django.db import models
 from django.db.models import Exists, F, OuterRef, Prefetch, Q, Subquery
 from django.template.defaultfilters import date as _date
 from django.utils.crypto import get_random_string
+from django.utils.formats import date_format
 from django.utils.functional import cached_property
 from django.utils.timezone import make_aware, now
 from django.utils.translation import gettext_lazy as _
@@ -1032,7 +1033,11 @@ class SubEvent(EventMixin, LoggedModel):
         ordering = ("date_from", "name")
 
     def __str__(self):
-        return '{} - {}'.format(self.name, self.get_date_range_display())
+        return '{} - {} {}'.format(
+            self.name,
+            self.get_date_range_display(),
+            date_format(self.date_from.astimezone(self.timezone), "TIME_FORMAT") if self.settings.show_times else ""
+        ).strip()
 
     def free_seats(self, ignore_voucher=None, sales_channel='web', include_blocked=False):
         from .orders import CartPosition, Order, OrderPosition