Fix updating nested attachments
Fix updating nested attachments

I think this should fix https://github.com/refile/refile/issues/142

callmeed/refile,monkbroc/refile,fabn/refile,ninjapanzer/refile,jabbawookiees/refile,jabbawookiees/refile,y-yagi/refile,fabn/refile,costis/refile,div/refile,JasOXIII/refile,ninjapanzer/refile,grosser/refile,refile/refile,superacidjax/refile,callmeed/refile,superacidjax/refile,Eric-Guo/refile,acrogenesis-lab/refile,abitdodgy/refile,y-yagi/refile,manfe/refile,manfe/refile,darkleaf/refile,toothfairy/refile,fabn/refile,callmeed/refile,ninjapanzer/refile,div/refile,toothfairy/refile,Axxiss/refile,darkleaf/refile,grosser/refile,JasOXIII/refile,Eric-Guo/refile,acrogenesis-lab/refile,monkbroc/refile,ChanChar/refile,refile/refile,Axxiss/refile,JasOXIII/refile,acrogenesis-lab/refile,costis/refile,ChanChar/refile,div/refile,refile/refile,superacidjax/refile,costis/refile,y-yagi/refile,monkbroc/refile,jabbawookiees/refile,grosser/refile,abitdodgy/refile,manfe/refile,toothfairy/refile,Eric-Guo/refile,ChanChar/refile,Axxiss/refile,abitdodgy/refile,darkleaf/refile