git: ignore MS Windows object files

Signed-off-by: Cristian Stoica <crististm@gmail.com>
fix_mw: drop MouseWheel bindings to individual text windows

- will be replaced by Text class bindings

Signed-off-by: Cristian Stoica <crististm@gmail.com>
fix_mw: drop forced focus used for handling MouseWheel

- forced focus was used as a means to achieve MouseWheel handling. This
  method has some drawbacks for normal usage and is not necessary with
  the  upcomming patches
- the net effect is that focus on input windows (e.g. FICS) will not be
  lost just by moving the mouse around

Signed-off-by: Cristian Stoica <crististm@gmail.com>
fix_mw: consistent mouse handling on all platforms

Make mouse wheel handling similar across platforms without requiring
window focusing.

This is achieved by replacing on Windows bindings to MouseWheel with
bindings to virtual events MWheel. These events are sent to the windows
with the mouse pointer instead of to the ones with focus.

Signed-off-by: Cristian Stoica <crististm@gmail.com>
fix_mw: replace original tcl/tk bindMouseWheel method

- the original tcl/tk procedure renders incorrect behavior if used
  since it binds to MouseWheel on Windows platforms. The override is
  necessary to maintain consistent and transparent mouse wheel handling

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