Mouse_navigationHandler constructor.
The mouse movements are the following :
- Wheel up : zoom in the camera
- Wheel down : zoom out the camera
- Click left+Ri + left mouse : pan the camera right
- Wheel press + left mouse : rotate the camera counterclockwise
- Click left + right mouse : pan the camera left
- Wheel press + right arrow : rotate the camera clockwise
- Click left + up mouse : pan the camera down
- Wheel press + up mouse : rotate the camera down
- Click left + down mouse : pan the camera up
- Wheel press + down mouse : rotate the camera up