Optimize widget redraw

Signed-off-by: Stanislaw Halik <sthalik@misaki.pl>
optimize HT widget refresh

Signed-off-by: Stanislaw Halik <sthalik@misaki.pl>
aruco: remove dead/broken code

Signed-off-by: Stanislaw Halik <sthalik@misaki.pl>
ht: remove dead code

Signed-off-by: Stanislaw Halik <sthalik@misaki.pl>