fix '+' showing for records w/o children
fix '+' showing for records w/o children

record.w2ui.expanded = 'none' gets reset to record.w2ui.expanded = false in a couple of places. But instead of changing all those places, it's more intuitive to just never show the '+' sign if the record cannot be expanded anyway due to missing children

aadrian/w2ui,aadrian/w2ui,vitmalina/w2ui,mpf82/w2ui,aadrian/w2ui,aadrian/w2ui,mpf82/w2ui,mpf82/w2ui,vitmalina/w2ui,mpf82/w2ui,vitmalina/w2ui,mpf82/w2ui,mpf82/w2ui,aadrian/w2ui,vitmalina/w2ui,vitmalina/w2ui,vitmalina/w2ui,aadrian/w2ui,mpf82/w2ui,vitmalina/w2ui,aadrian/w2ui