Since Dolphin got ported to KF5 with version 15.08.0, the file context
menu is missing entries such as the Ark archive actions.
There is an upstream issue , according to which the issue is caused
by konqpopupmenuplugin.desktop missing in /usr/share/kservicetypes5/.
Indeed, if I copy it from the kde4 location
/usr/share/kde4/servicetypes/, the missing entries re-appear in the
context menu. Upstream is undecided on how to fix this issue. Perhaps we
could ship this file downstream with some kf5 package, or perhaps with
dolphin itself, until this is sorted out?
Konsole output Thanks