Add corresponding style.
Should fix#5984
Error when (auto)saving and things along should stand out in the
UI for the user to investigate the reason as soon as possible not to
loose work later.
add casper.wait_for_busy
like wait_for_idle, but busy
restore kernel notification widget
it's still used for interrupt / restart
use wait_for_busy in check_interrupt test
Matthias BUSSONNIER
Jonathan Frederic
MinRK