also only provide a default name for partition containing a file system fix #17958 Change-Id: Ib5a8928dc5272a400a99aa05b792201f3a6a2c7d Reviewed-on: https://review.haiku-os.org/c/haiku/+/5705 Tested-by: Commit checker robot <[email protected]> Reviewed-by: waddlesplash <[email protected]>