That one is quite quickly eplained.
What's the request?
Sorting the "direct routes from here" list. Either by name or distance or selectable sorting(name, distance, travel time)
Why?
The list is quite useful to optimize transport networks, especially for short distance transports where walking passengers play a role but also to optimize transfers in between stations.
I do also use this very often to roughly compare and optimize travel times of my routes, as it is easyer to read than "travel times" window, which does only include travel times but without loading times.
In either way one has to find the destination in the list, which currently is a pain, especially for central railway stations that are directly connected to many destinations.
How?
I don't know the UI code so I can't assist with any technical ideas here. Apart from the technical side, it's straight-forward.
If any kind person ever tries to add this feature, they might want to look at Ranran's improved Station Details patch (https://forum.simutrans.com/index.php/topic,19069.0.html), which is currently stuck due to a UI question. It would be unfortunate if two proposed features were incompatible.