撤销 dsh 的改动

undohaven restore --to <snapshot-id> --scope all。先退出 dsh，再恢复本机最近一份快照。快照在本机时不需要账户。

undohaven restore --to <snapshot-id> --scope all. Quit dsh, then restore the last local snapshot. No account is required when the snapshot is already on this machine.