move persistence deletion into _onDelete()
move persistence deletion into _onDelete()

tomaszdurka/CM,vogdb/cm,cargomedia/CM,fauvel/CM,fauvel/CM,mariansollmann/CM,tomaszdurka/CM,zazabe/cm,mariansollmann/CM,alexispeter/CM,njam/CM,alexispeter/CM,mariansollmann/CM,fvovan/CM,alexispeter/CM,vogdb/cm,fvovan/CM,tomaszdurka/CM,zazabe/cm,fauvel/CM,fauvel/CM,vogdb/cm,tomaszdurka/CM,zazabe/cm,fauvel/CM,cargomedia/CM,zazabe/cm,njam/CM,cargomedia/CM,vogdb/cm,fvovan/CM,alexispeter/CM,fvovan/CM,mariansollmann/CM,njam/CM,cargomedia/CM,tomaszdurka/CM,njam/CM,njam/CM,vogdb/cm