Marker Categories

[Psychophage]

With our server, we find that we have almost too many icons in close proximity to each other.
As a feature request, I was hoping it would be possible to expand on the layers to be able to assign different markers to different layers.

[0wamate0]

For me, I'm building railway in my server, and have created multiple networks.
Therefore, I want to have 2 or more layers or categories to differentiate stations for different networks.