Ah, finally found that option – only on the enhanced taskbar in context menu. Very unintuitive not putting this in the settings at least also, as usual. 
Thanks, but I did not like it; feels strange and maybe with that approach Object Dock would make more sense (if not for the experience we made with it several years ago before they canceled it and the current pricing horror going on at Stardock).
However, I guess I keep the enhanced taskbar at least for the additional customizability.