Merge branch 'import_nk15' into 'master'

Import nk15

See merge request bde/nk20!23

apps/note/models/notes.py

@@ -27,6 +27,12 @@ class Note(PolymorphicModel):
         help_text=_('in centimes, money credited for this instance'),
         default=0,
     )
+    last_negative= models.DateTimeField(
+        verbose_name=_('last negative date'),
+        help_text=_('last time the balance was negative'),
+        null=True,
+        blank=True,
+    )
     is_active = models.BooleanField(
         _('active'),
         default=True,

apps/note/models/transactions.py

@@ -164,10 +164,6 @@ class TemplateTransaction(Transaction):
         TemplateCategory,
         on_delete=models.PROTECT,
     )
-    name = models.CharField(
-        max_length=255,
-    )
-
 
 class MembershipTransaction(Transaction):
     """