Mark "internal" jobs as transient
This marks jobs as transient that are usually internal to an application and that provide no useful actions once completed, such as a stat or mimetype job.
Depends on kjobwidgets!13 (merged)
- Opened remote image in Gwenview, got a "Examining…" (StatJob) popup that completely vanished (no entry in history) after it was done
- Opened a remote image in Kolourpaint, got a StoredTransferJob popup that completely vanished after it was done
Didn't try kioexec, that could also use some "dont spam my history when you sync the file back up" treatment but can be looked at separately.