Menu Selector Name is Not Retrieved on Settings Form

The slideshow style settings form is not retrieving the current setting for Menu Selector.

So if you go back in and edit other slideshow style settings and then click "save," (without remembering to re-enter the class name), a blank Menu Selector field will then overwrite the previously saved setting. And that, of course will mean that the activeSlideMenu class will not be appended to the current menu item.