Scroll position reverts to level's screen start when undo or redo is used

[Nami Verasche]

http://www.lemmingsforums.net/index.php?topic=2681.0

This happens because the Undo / Redo feature basically works by saving copies of the level to memory and then loading these. Knowing why is not the same as fixing, though.

[Nami Verasche]

Fixed.