Disk Device Manager: checks the raw content_name when editing a partition

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 <no-reply+buildbot@haiku-os.org>
Reviewed-by: waddlesplash <waddlesplash@gmail.com>

btrfs: add initial disk system add-on

Change-Id: I8f26a78770e679527a99b49a04557c1aa4334b53
Reviewed-on: https://review.haiku-os.org/c/1396
Reviewed-by: Jérôme Duval <jerome.duval@gmail.com>