Nanocube command --> remove initial 'siph:' #34

I was working with the nanocube commands in the SiPHCommandGroup. The commands as they are implemented e.g.:
self.comm.send(f"siph:get_nanocube_z {probe.to_string()}")
give me the following error:

'ProberException: Unsupported remote command: siph:get_nanocube_xy West'

removing the initial 'siph:' seems to get the function working, i.e. using:

self.comm.send(f"get_nanocube_z {probe.to_string()}")

returns the correct position tuple.