Set the notification priority to high

ctabus/internal/notification.py

@@ -76,6 +76,8 @@ class NotificationManager:
             NOTIFICATION_EXE,
             "--id",
             self.id,
+            "--priority",
+            "high",
             "--on-delete",
             "echo {} > {}".format(self.id, self.listen_fifo_path),
         ]