Fix completion of `backupFolder()`
Fix completion of `backupFolder()`

If there's no return here, then the fireOnRequestFinish() below will
delete the request and the lambda will crash at its call to
fireOnRequestFinish()

Acidburn0zzz/sdk,meganz/sdk,meganz/sdk,Acidburn0zzz/sdk,Acidburn0zzz/sdk,meganz/sdk,Acidburn0zzz/sdk,Acidburn0zzz/sdk,meganz/sdk,Acidburn0zzz/sdk,meganz/sdk,meganz/sdk,Acidburn0zzz/sdk,meganz/sdk,Acidburn0zzz/sdk