fixed the pcb update display. added a private function that seeks out
the row to update based on the calling pcb's pid number. Prior it would
create a row based on a pid number BUT if say we did load, load then ran
1 before 0 -- nothing would display because we are adding a row before
it can be added. Now rows get created with insertRow(-1) which I will
explain when I add comments BUT basically for cross browser compat we
need -1 vs just insertRow();