GetStaticComponentMaskParameterValue returns the value for Static Switch Parameter

UMaterialInterface::GetStaticComponentMaskParameterValue gets the parameter value from the static switch list instead of from the StaticComponentMask list

GitHub branch 5.8 still looks to have this issue.

MaterialInterface.cpp#L557

The solution might be simply changing EMaterialParameterType::StaticSwitch to instead be EMaterialParameterType::StaticComponentMask in the aforementioned function.

Steps to Reproduce

1. Call GetStaticComponentMaskParameterValue(...) on a Material Interface
2. Observe result to be incorrect