Add working property concept
Add working property concept

agdsn/sipa,MarauderXtreme/sipa,fgrsnau/sipa,fgrsnau/sipa,MarauderXtreme/sipa,lukasjuhrich/sipa,agdsn/sipa,lukasjuhrich/sipa,agdsn/sipa,lukasjuhrich/sipa,MarauderXtreme/sipa,agdsn/sipa,fgrsnau/sipa,lukasjuhrich/sipa