When putting modem in online state it would already make it scan for
operator, we have no need to make it scan for operators again and waste
time for operation takes long time.
Otherwise we have screenlocker occupying the shortcut keys and they do
not work in the shell when we want to use regularly.
If screen is locked, the kglobalaccell will handle the volume keys
automatically by itself and we do not need to handle it in the
lockscreen.
