Mouse scroll wheel navigation

Navigate figures with the mouse scroll wheel.

Tired of clicking the task bar to find the figure window that you want? So was I, so I decided to use the mouse scroll wheel as a way to change the current figure.

This function will update the figure WindowScrollWheelFcn so that the mouse scroll wheel can be used to cycle through figures.

It can also set the default figure create function to automatically activate this function when a new figure is created.