angular: Fix deletion of speakers
angular: Fix deletion of speakers

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