Fix searching for parent item types, search for file source instead of item source for the file item type in case the item was converted
Fix searching for parent item types, search for file source instead of item source for the file item type in case the item was converted

pmattern/server,bluelml/core,cernbox/core,sharidas/core,pmattern/server,sharidas/core,andreas-p/nextcloud-server,bluelml/core,xx621998xx/server,owncloud/core,cernbox/core,michaelletzgus/nextcloud-server,pollopolea/core,jbicha/server,jbicha/server,endsguy/server,nextcloud/server,Ardinis/server,owncloud/core,sharidas/core,xx621998xx/server,andreas-p/nextcloud-server,bluelml/core,xx621998xx/server,bluelml/core,sharidas/core,endsguy/server,cernbox/core,Ardinis/server,jbicha/server,Ardinis/server,Ardinis/server,bluelml/core,whitekiba/server,michaelletzgus/nextcloud-server,xx621998xx/server,pixelipo/server,jbicha/server,lrytz/core,IljaN/core,andreas-p/nextcloud-server,lrytz/core,nextcloud/server,pixelipo/server,endsguy/server,IljaN/core,andreas-p/nextcloud-server,endsguy/server,pollopolea/core,owncloud/core,michaelletzgus/nextcloud-server,pollopolea/core,lrytz/core,whitekiba/server,IljaN/core,cernbox/core,owncloud/core,owncloud/core,jbicha/server,whitekiba/server,pmattern/server,endsguy/server,pollopolea/core,pixelipo/server,lrytz/core,pmattern/server,IljaN/core,sharidas/core,whitekiba/server,xx621998xx/server,nextcloud/server,cernbox/core,phil-davis/core,pixelipo/server,michaelletzgus/nextcloud-server,nextcloud/server,Ardinis/server,pmattern/server,pixelipo/server,lrytz/core,IljaN/core,andreas-p/nextcloud-server,whitekiba/server,pollopolea/core