Prevent multiple daemons and apps from being able to stealthily run on the same system

[C0rn3j]

When debugging I often seem to accidentally launch scc-daemon and sc-controller multiple times, and then be surprised why they fight and steal input from each other.

I don't think there is a reason to allow having multiple of them run, at least not with zero detection capabilities, so consider either hard blocking it or at least warn the user when it happens.