Sorry, RMB :) Used Polish name for some reason. There was, in a form of the icon plasmoid. It worked and behaved completely differently than Folder View does,

Sorry, RMB :) Used Polish name for some reason. There was, in a form of the icon plasmoid. It worked and behaved completely differently than Folder View does, but if you really wanted, you could have some icons on the desktop. It still works, by the way - it gets created when you drag'n'drop something into the non-Folder View based desktop. I think drag'n'dropping might have been added shortly after 4.0, but the icon widget was there from the beginning for sure.