sleep compromise

Remember about the sleep veto debate? I think we should compromise by: * Notifing when a program vetos or takes too long to respond to the PBT_APMSUSPEND or PBT_APMQUERYSUSPEND omessage. * Giving the user choice about whether to allow vetoing and allow the user to set the limit on how long programs can take to respond to the PBT_APMSUSPEND or PBT_APMQUERYSUSPEND message before the user is notified if vetoing is allowed or if not, force the computer to sleep. * Allowing programs to detect whether the lid is closed.