#798 Snaikka: lowered-sail variants for health 20/60/80

[Sahits GmbH]

The Snaikka (ships/schnigge/Snaikka_SailDown.blend) has a working lowering animation and a frozen lowered state for health 40 (grp_schnicka_sail_damaged) and 100 (grp_schnicka_sail_complete). Build the frozen lowered collections for 20, 60 and 80 the same way (freeze the frame-184 pose, material pointing at the mainSail/fockSail_snaikka_health_NN alpha/damage pair). Textures exist in texture/CC 0/custom_made/.