SABnzbd-Suite: Prevent idle shutdown on verify/repair/extract

This change will prevent SABnzbd-Suite from doing an idle shutdown when SABnzbd is verifying, repairing and extracting. Repairs on large files can take hours on slower machines.

I've also changed that the script runs once per minute, not four times per second. This lowers SABnzbd's CPU usage and machine load. The only problem could be if someone changes the wakeup settings in the GUI and immediately sleep the machine (before the script runs again), then the changes won't get written to the RTC alarm.

Opinions?

@lsellens