right now this will just end up in the log, since not even the
notification display is implemented beyond the GuiNotification-facade.
Anyway, we get some kind of communication now for real, in the actual application
...because due of #211, we usually don't execute commands yet.
For now there is only the backdoor to prefix the command-ID with "test"
With this change, the TODO message appears now immediately after GUI start!
...which opens more questions than it solves at the moment.
Especially note #1096, the question how to refer to object-IDs
Maybe we need to enable sending EntryIDs via GenNode?
Anyway, the magic spell is broken now: we have a way how to
establish commands and how to issue them from the UI, with full integration
of UI-Bus, layer separation facade, instance management and ProcDispatcher
Looks like a stepping stone
