set [1] 1s/1s, [2] 5m/1m, [3] 25m/5m, [4] 50m/10m
[+/-] minute, hold [Ctrl] 1s, hold [Shift] 5m, [9/0] font size
[Enter] work/pause, [R] rest, [W] work, [Esc] set, [H] hours, [`] toggle help
mobile: [SwipeRight] set time, [SwipeUp] start/pause, with double touch set