The code in adjustQuantityOnScreen() needs an current quantity. This is
determined during the long button press. If no such long button press
happens, get the quantity by explicitly receiving parsed frames. But
don't read those parsed frames if a long button press happened; this
is redundant and just slows down the function.
Signed-off-by: Carlos Rafael Giani <crg7475@mailbox.org>
8b2666ff74