Take into account requests within a job when calculating progress

[JasonBarnabe]

Right now if you have 2 jobs, the progress will go 0, 50, 100. For a more accurate picture of the progress, and to show the user that progress is actually being made, we should take into account the requests within each job. For example, if Job A has 1 request and Job B has 4, then it would go 0, 50, 62, 75, 87, 100.

This would be especially useful for users who have one big job with lots of requests in it.