* Job.cc, Job.h: (FormatShortStatus) new virtual method; don't check Deleted() for jobs in the lists; use xlist_for_each_safe when it's possible to remove scanned node from the list.
* MirrorJob.cc, MirrorJob.h: implement FormatShortStatus.
* CopyJob.cc: use Speedometer::GetStrProper for final rate reporting.