Add collapsible categories to trains and stations

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The reason for this idea is that it becomes really hard to monitor your trains on large bases. Trains are randomly sorted (or in the order of their creation) making the task quite complex.

I have found a thread for naming vehicles which is relevant viewtopic.php?f=6&t=28829

Adding support of naming trains would be awesome. However naming itself does not help much unless you can actually use it.

So support for sorting trains by name (the least possible feature) should definitely be implemented along with the ability to actually manually name them.

Next level of upgrade would be assigning collapsible categories to trains and train stations. While it will be a complex task for developers, the end result would please really many players.
So when you open up train management interface or a station pick list, you would see all categories collapsed to a single line and when clicking it (or expand marker) it would show its contents. When station is in the schedule it would display like "Category/Name"

Right now stations are sorted by name making it easy to manage them using a certain naming convention. In theory it would be acceptable to use the same strategy with trains IF they could be named and sorted by it in train manager so collapsible categories are not that much needed given the complexity of implementation.