Tracking numbers for shipping token doesn't work

[sietsevandreven]

Isotope 2.7
Contao 4.9.12
NotificationCenter Version 1.5.18

When Updating order status:

We want to use Tracking Numbers. Under that field there's the following help text:
Here you can enter the shipping tracking information. Use the ##log_shipping_tracking## simple token in the notification.

But whenever we try to use ##log_shipping_tracking## in our corresponding Notification Center message, our text editor gives this error:
The following tokens you have used are not supported by this notification type: ##log_shipping_tracking##

[qzminski]

It's only about the labels and it will be fixed once #2207 is merged.