display: Only show ACK'ed transactions on default verbosity level.

Others are either NAK'ed (was hidden) or time out (was shown).
parser: Take speed setting at reset start time into account too.

Device may start a reset after chirping but before host chirp, and such
reset must be taken into account as a LS/FS reset.
parser: Queue to_top calls while a reset is running.

Fixes output chronological sort.
parser: End reset when any RXCMD event is present.

Reset ends when device is disconnected, and ends when receiving data.
That last point is a no-op in practice, as RxActive is by definition
preceded by DATA0/1 pattern, which also end reset.
display: Sleep between polls in 'follow' mode.
display: Handle KeyboardInterrupt and EPIPE gracefully.