[See notes] Disable voltage tables when conditions not met

The original implementation was that the TableLayout would simply be
configured to View.GONE when the voltage parameters were null and the
check for isShown would determine whether to send the data or not. This
left one flaw in that the view would not show what SHOULD have been
there to notify the user that this is simply not a feature of their
kernel. Instead, a loop takes care of diabling all of the Button and
EditText fields. The call to disable the TableLayout that accompanies
this does not provide any visual functionality, but it does assign the
flag to the layout which, in theory, will allows checking isEnabled on
the TableLayout ONLY to send the values.