FoliageType kills LOD of child StaticMesh if you have LOD_Group

[aiiven]

Since there is support for FoliageType, I now scatter those rather than simple Static Mesh. The LOD_Group from Houdini was still applied to the points.

When rebuilding the landscape in Houdini, I lost all the LOD of Trees and Rocks on their Static Mesh (Houdini instructed UE to delete them). When I deleted the LOD_Group node in Houdini, it now does not delete LOD anymore in UE.