Replace KICAD6_3DMODEL_DIR with KICAD7_3DMODEL_DIR
Requested in !3220 (merged) for a single model, but it would make more sense to switch everything at once. (Unless there's a good reason not to do so?)
Requested in !3220 (merged) for a single model, but it would make more sense to switch everything at once. (Unless there's a good reason not to do so?)