Show Light Source Radius in Description for LightSources, not just ActiveLightSources

[Cass]

Took my ages to even realise different light sources had different radii, this feature is already implemented into the ActiveLightSource part, but that is only on a couple devices. I imagine adding it to the LightSource is likely as simple as copy pasting the code over - or to avoid redundant given the two parts do super similar things it would probably be possible to have one just inherit from the other - or even just merge them with different behaviour depending on fields given.