Enable users to change the frequency for Scan and Process

The default interval for auto process is 10 minutes. This high frequency causes problems for users with Sick-Beard on NAS devices that want to use deep sleep, like Synology. Deep sleep is only possible when there is no hard drive activity, which will reset the inactivity counter. So every time SB does a scan on the hard drive, the device will wake up from deep sleep if it can go to sleep at all.

Being able to lower the frequency to something like 120 minutes or even less will solve this issue.