move process name to be the last argument

[satvik007]

Process/command names can have spaces in them. For the below logic (line 87) to work, process name must be the last argument to the ps call.

while (h.length) {
    row[h.shift()] = h.length ? columns.shift() : columns.join(' ');
}

I can't quite generate a failing test case on demand at the moment but see the below screenshot, many processes created by Firefox have space character in between.

[jancurn]

Looks good to me, thanks!