Merge pull request #7 in ZP/z-push from bugfix/ZP-641-filestatemachine-backend-storage-file to develop

* commit 'f087cedd':
  ZP-641 Make sure CleanStates does not touch permanent backend storage files, unless we really want to delete them.
  ZP-641 Revert "For Backend Storage type files, add a user element to the file name so that multiple accounts on the same device do not overwrite each others data in a single file named only for the device."
  For Backend Storage type files, add a user element to the file name so that multiple accounts on the same device do not overwrite each others data in a single file named only for the device.

(cherry picked from commit 0cbe61f5)