Allow parametrization of colour in blueprints.

[GTG3000]

I think it'd be nice if you could set lamp / train station colours as you paste the blueprint.

I add lights to my stations that are the same colour as the station (for aesthetic reasons) and while the station itself can be just set to be same as other station after pasting (although with parametrization, it is instead done by changing the resource icon in the name), the lights require me to go and manually set at least one to the right colour before copying them with shift-clicking. Can't even copy colours from a station to the light.

I know you can parametrize the lights via wire signals but that doesn't work for the station. And having a colourpicker instead of three number fields would be preferrable.