[0.10.9] Bad Filter Source

[Zebulan]

This likely still exists in 0.10.10 but cannot confirm.
When you are applying item filters to a cargo unit on a train (By using Middle-Mouse Button) and the train moves away, the filter fails and crashes the game with error "Bad filter source."

How to duplicate:
- Set train on a schedule to go from station A to B
- Access a cargo unit inventory
- Middle-Mouse Click any unit
- Do not close window (You should be in the "choose an item" window)
- Wait for train to leave, when it moves away the inventory window closes but the filter window does not.
- Click on any filter object. The game crashes, with the inventory window closed.

[kovarex]

Thanks for the report, it is fixed for 0.10.11

It will not crash when it happens and in addition the filter selection gui is also closed when the wagon goes away.