menu: implement up/down button
- Makefile: generate apps_sim file
- tkbio_type_select: forceprint when setting value
tsp: fix next/prev direction
tkbio: fix signal handling #2
- remove custom signal handler
- signals delivered with events
- tkbio_def: add queue for signals/2nd event from focus_out-in
- secure event queue per sigprocmask
- menu: update childs on signal event