Fixing the projector sidebar on firefox (closes #2420)
Fixing the projector sidebar on firefox (closes #2420)

FinnStutzenstein/OpenSlides,boehlke/OpenSlides,tsiegleauq/OpenSlides,normanjaeckel/OpenSlides,OpenSlides/OpenSlides,tsiegleauq/OpenSlides,ostcar/OpenSlides,emanuelschuetze/OpenSlides,tsiegleauq/OpenSlides,OpenSlides/OpenSlides,CatoTH/OpenSlides,jwinzer/OpenSlides,emanuelschuetze/OpenSlides,CatoTH/OpenSlides,CatoTH/OpenSlides,boehlke/OpenSlides,boehlke/OpenSlides,FinnStutzenstein/OpenSlides,emanuelschuetze/OpenSlides,jwinzer/OpenSlides,jwinzer/OpenSlides,FinnStutzenstein/OpenSlides,emanuelschuetze/OpenSlides,jwinzer/OpenSlides,FinnStutzenstein/OpenSlides,normanjaeckel/OpenSlides,ostcar/OpenSlides,jwinzer/OpenSlides,CatoTH/OpenSlides,normanjaeckel/OpenSlides,ostcar/OpenSlides,normanjaeckel/OpenSlides,boehlke/OpenSlides