Add fixture 'stairville/mh-x50' (#1363)
Add fixture 'stairville/mh-x50' (#1363)

Co-authored-by: Hannes Rüger <71b0b848561008e22981c6620d11406f65a5f01e@gmx.de>
FloEdelmann/open-fixture-library,FloEdelmann/open-fixture-library,FloEdelmann/open-fixture-library