[Bug] Rail buttons do not scale (size or instance separation)

![Simple RB Rev_02](https://user-images.githubusercontent.com/68821492/189506780-4cca97fd-70a6-4451-bb97-8c3aed6765cb.png)

[Simple.RB.Rev_01.ork.txt](https://github.com/openrocket/openrocket/files/9541596/Simple.RB.Rev_01.ork.txt)