git: ignore MS Windows object files
Removed auto focus exchange and old mousewheel code
Added special mousewheel handlers
allow board to take focus on click

- this re-enables keyboard bindings since they work only on focus

Signed-off-by: Cristian Stoica <crististm@gmail.com>
Fix: Platform consistent MouseWheel behavior on Windows platform

This allows windows to answer MouseWheel events without having focus.

MouseWheel events are replace with virtual events MWheel that are sent
to the windows having the mouse pointer.
All original bindings on MouseWheel are disabled and replaced with
identical bindings on MWheel

Signed-off-by: Cristian Stoica <crististm@gmail.com>