fix service restart for converged branch

[tehn]

Pretty sure this does it, but need to test on device.

[colinmcardell]

This works:

{
    "units" : {
        "matron": "norns-main.service",
        "supercollider": "norns-sclang.service"
    }
}

[ngwese]

we should probably rename the repl tab if not done already. also a quick scan of the server code to make sure that refers to the process as norns instead of matron

[colinmcardell]

I've added an issue tracking the need for this fix as well as the clean up work. #231