Add Probe protection subroutine for wireless probes

[Alexfehr1987]

Currently in Probing routines its just checked if the Probe is in the Machine, but not if its "connected". Especially for Wireless Probes a check would save tips.
I solved this by adding a probe protection subroutine in every probing routine, which checks if the connection is established and pauses the programm if its not connected:

o<probe_protection> sub
#<probe_error_pin> = #5399
M66 P0
(Probe Protection)
o100 while[#<probe_error_pin> EQ 1]
(MSG, Probe not active!)
M0
M66 P0
#<probe_error_pin> = #5399
o100 endwhile
o<probe_protection> endsub
M2 (end program)

Maybe something like this can be added to the routines in the future