Load also json-only kfileitemaction plugins
Review Request #128746 - Created Aug. 24, 2016 and submitted
There are actually a couple of bugs in the dolphin side that I already fixed here (dolphin returns if KMimeTypeTrader doesn't find anything; dolphin doesn't check if a json-only plugin is added twice) - I will fix them in Dolphin with separate patches.
ark's plugins (Extract/Compress menus) now works. They can also be enabled/disabled in Settings -> Configure Konqueror -> File Management -> Services (though this is handled by dolphin).