The following 'keys' are now available for binding:

* "wheelup"
* "wheeldown"
* "wheelleft"
* "wheelright"

In addition, there are now new default bindings using the scrollwheel:

* "wheelup" in edit mode - previous line
* "wheeldown" in edit mode - next line
* "wheelup" in flight mode - zoom in
* "wheeldown" in flight mode - zoom out

The new zooming binds in flight mode replace the hardcoded zoom from before.