Change the category prefix to optional
Change the category prefix to optional

normanjaeckel/OpenSlides,tsiegleauq/OpenSlides,normanjaeckel/OpenSlides,ostcar/OpenSlides,ostcar/OpenSlides,normanjaeckel/OpenSlides,OpenSlides/OpenSlides,tsiegleauq/OpenSlides,OpenSlides/OpenSlides,tsiegleauq/OpenSlides,normanjaeckel/OpenSlides,ostcar/OpenSlides