simutrans 100.0 & r1953
This problem was reported in old forum by agamemnus.
http://archive.forum.simutrans.com/topic/07613.0/index.html
When I scroll mouse wheel on schedule window, list item under mouse wheel will be selected.
If it was delete mode, list item under mouse wheel will be deleted.
This problem doesn't happen when I scroll mouse wheel on right side scroll bar.
How to reprodece:
1. Open schedule window.
2. Click "Delete" button.
3. Scroll mouse wheel on one of the list items of schedule window.
Ok, misunderstood your request. Under investigation.
Check r1956
Solved in r1956. Thank you.