[QA] Increase default value for polling intervall (wait longer between polls per default)

[Martin M.]

The current default value for the polling intervall ("fastscan") is 500ms. This seems to be far to often.
Diskdata will not change significantly within 0,5s, neither will the temperature etc.

A default value for fast scanning of at least 10s, better 30 or even up to 60s seems to be much mor appropiate. User might reduce the value if he as a need for ist and his system confifuration will allow. Personally I would suggest to limit the scan in addition to 1s minimum.