Enable RTS for tally connection.

Signed-off-by: jdramer <jdramer@users.noreply.github.com>
Add handling for tally display indication.

Signed-off-by: jdramer <jdramer@users.noreply.github.com>
Add a pre-display queue.

Ensures new items are not displayed while the currently display
is active.

Signed-off-by: jdramer <jdramer@users.noreply.github.com>