Show train visualization guide / hint for ghost stations / rails

[AllenJB]

With reference to: 116937 and viewtopic.php?t=118027 (same issue, declared "not a bug")

Building stations with everything in correct alignment is a pain without the train visualization. This is even more true now engineers are often expected to plan builds in confined spaces, and out of reach of an existing bot networks, such as on Fulgora (before foundations are available).

[manuco]

I agree