Add variation descriptions and allow to order addons

src/pretix/base/models/items.py

@@ -310,6 +310,8 @@ class ItemVariation(models.Model):
     :type item: Item
     :param value: A string defining this variation
     :type value: str
+    :param description: A short description
+    :type description: str
     :param active: Whether this variation is being sold.
     :type active: bool
     :param default_price: This variation's default price
@@ -327,6 +329,11 @@ class ItemVariation(models.Model):
         default=True,
         verbose_name=_("Active"),
     )
+    description = I18nTextField(
+        verbose_name=_("Description"),
+        help_text=_("This is shown below the variation name in lists."),
+        null=True, blank=True,
+    )
     position = models.PositiveIntegerField(
         default=0,
         verbose_name=_("Position")
@@ -413,9 +420,14 @@ class ItemAddOn(models.Model):
         default=1,
         verbose_name=_('Maximum number')
     )
+    position = models.PositiveIntegerField(
+        default=0,
+        verbose_name=_("Position")
+    )
 
     class Meta:
         unique_together = (('base_item', 'addon_category'),)
+        ordering = ('position', 'pk')
 
     def clean(self):
         if self.max_count < self.min_count: