Change IsLowDetail in IsShadowInsignificant so a renderer with 2 LOD states does not always disable shadows with aggressiveShadowLod setting enabled
Now only disable shadows if the current LOD is within the lower LOD range for this renderer. If only one LOD state exists then still disable shadows like before
Fixes the hatch part of the ladder hatch not rendering shadows with aggressiveShadowLod enabled