#57 Deduction shortcut remove

* removes deduction shortcut
* adds missing quality checks on intervention deduction accounts validity
* fixes error if checked intervention shall be checked again
* adds/updates translations

intervention/models/intervention.py

@@ -145,7 +145,8 @@ class Intervention(BaseObject, ShareableObjectMixin, RecordableObjectMixin, Chec
 
     def set_checked(self, user: User) -> UserActionLogEntry:
         log_entry = super().set_checked(user)
-        self.add_log_entry_to_compensations(log_entry)
+        if log_entry is not None:
+            self.add_log_entry_to_compensations(log_entry)
         return log_entry
 
     def set_unrecorded(self, user: User):