[LMP] Code style fixes.
[Util] Added SetJobHolderProgress().
[Zalil] Return PendingUploadBase* from Upload().
[Zalil] Debug output on failed upload delegation.
[Zalil] Implement IJobHolder.
[Zalil] Repr upload row in PendingUploadBase.
[Zalil] Set progress data on progress repr row.
[Zalil] Mention IJobHolder in Q_INTERFACES().
[Zalil] Append pending's upload to the repr model.