fix: #SSW-1335 Fächer lassen sich teilweise nicht immer aus Klassen entfernen
fix: #SSW-1335 Fächer lassen sich teilweise nicht immer aus Klassen entfernen

DerDu/SPHERE-Framework,BozzaCoon/SPHERE-Framework,hannesk001/SPHERE-Framework,BozzaCoon/SPHERE-Framework,hannesk001/SPHERE-Framework,hannesk001/SPHERE-Framework,hannesk001/SPHERE-Framework,BozzaCoon/SPHERE-Framework,hannesk001/SPHERE-Framework,BozzaCoon/SPHERE-Framework,BozzaCoon/SPHERE-Framework,BozzaCoon/SPHERE-Framework,hannesk001/SPHERE-Framework,DerDu/SPHERE-Framework,DerDu/SPHERE-Framework,DerDu/SPHERE-Framework,hannesk001/SPHERE-Framework,DerDu/SPHERE-Framework,BozzaCoon/SPHERE-Framework,DerDu/SPHERE-Framework,DerDu/SPHERE-Framework