SKPReader - Windows within components do not behave properly

[germolinal]

Windows within components are Bulked into the definition instead of being treated as Windows.

Expected behaviour

1. Their vertices should be transformed into global coordinates
2. The transformed polygon should be added to the "Windows" section in the EmpModel.
3. We need to deal with names.... the same will happen with workplanes.

Workaround

Explode the model.