Changing the number of items per page in the quarantine digest

Is there a way to increase the number of items per page in the quarantine digest from 20 to (say) 500?

At the moment 'checking' takes too long. I have to repeatedly tick the 'select all' check box, then the delete and then go to the next page and repeat.

I would rather scan a long list - pick any for delivery and then nuke everything else in one go.

A longer list taking time to display (probably not an issue on our internal network) would be prefferable to repeated point and click (even if the total time is the same)

Thanks in advance