Fixes #1195: Make NPCs equip torches in interiors under certain conditions
Fixes #1286 (Dialogue topic list clips with window frame)

The first problem was with the ScrollView skin, which had a full-sized client area. Since the scrollbar starts out visible, MyGUI expects the client area to be smaller to accomodate for the scrollbar width. As a result, the starting canvas size becomes bigger than the view size.
Another bug was with the MWList code: reducing the canvas size for the scrollbar is not needed, since MyGUI is already doing that, and attempting to do it manually interferes with the view offset.