device use test_support project
fix bug: notify callback after add ReadyCallback
fix bug: convert hrange right
add SetButtonColor()
fix bug: front check stop notify OnStateChanged()
call OnStop() when no running
fix bug:
use Volt no VoltRange
Decode add Offset
fix bug: Layout immediate
fix bug: back check no return early
fix bug:
when close just release view the view delete itself
canscope_window delete canscope_view
fix bug:
init show_model
set show_model_
Add to exist container when > 0
add change_model button