There could be other methods of connecting than the network connectivity of the UM3NetworkPrinting plug-in. For instance, perhaps other network connection plug-ins can provide information in this monitor stage. Or the user might want to use a USB cable.
I'm explicitly quite vague about how it should be connected because this label should work for all types of connections except UM3NetworkPrinting.
Fixes#9444.
4fc91d4f6d