Nanite mesh not culled when owner is editor only actor in gameview

Nanite mesh is not culled because "DrawInGame" value in the primitive uniform buffer is always 1.

Can be fixed with below modification:

// in FPrimitiveSceneProxy::FPrimitiveSceneProxy

DrawInGame &= !InProxyDesc.IsHidden();  
// change to
DrawInGame &= !InProxyDesc.IsHidden() && !InProxyDesc.bIsOwnerEditorOnly; 

1. Add a nanite mesh into level and check "Is Editor Only Actor" in actor detail panel
2. Add a regular mesh into level and check "Is Editor Only Actor" in actor detail panel
3. press G to enter Game view

result: regular static mesh is hidden in viewport while nanite mesh not