It was shoe-horned in at the time, which is not exactly ideal. Time to clean it up somewhat?

Roadmap:

• Check Masque support and make sure everything works
• Clean up after everything is repaired
• Remove legacy LBF (LibButtonFacade) code
• Optional: Check default borders without Masque enabled - I think some API changes broke them and it looks weird - but only sometimes (?)

Finally working properly in 2042a35 - closing this as resolved.