[Rseding91] Trains window - Scrolling after filtering

[bzzz]

Steps to reproduce:

1. Open Trains window:

20160823194248_1.jpg (809.74 KiB) Viewed 1854 times

2. Scroll down a little bit, I've scrolled for a half a row:

20160823194357_1.jpg (692.88 KiB) Viewed 1854 times

3. Use filter to reduce the list to only several trains, here is only one left:

20160823194407_1.jpg (490.37 KiB) Viewed 1854 times

As you can see, even having only one train in the list, the scrolling was not reset to the top. There is no scrolling bar here, but the scrolling is still possible by using mouse wheel while hovering over a train info. And if you scroll down too much, I'll end up with this:

20160823194423_1.jpg (471.96 KiB) Viewed 1854 times

(No scrollbar, no scrolling by mouse wheel, just an empty window).

And by the way, using mouse wheel over train schedule should scroll the schedule, to the whole list of trains

[Rseding91]

Fixed for the next version of 0.13/0.14.