ProgressManager: Give individual tasks same range in summary bar

The total range was sum of individual ranges so far, so e.g. parsing/
2).

Change-Id: Ia9133376be3219c12101435ba2e2ae27c32df6f8
Reviewed-by: hjk <hjk121@nokiamail.com>
Reviewed-by: Eike Ziller <eike.ziller@digia.com>