Checkbox for iteration

Added the option to handle whether the user wants to iterate through the
assignment of button mappings or assign them one at a time.

fixed formatting issues and code style.

I excluded this option from the config file. This stopped the check box value and the boolean from becoming offset. Since the option should always start as false.

 This still causes an issue with the Wiimote input, since the class variable that keeps the state will be wiped, but the check box value will stay the same after closing/reopening without closing the entire Wiimote configuration. I am looking for a way to resolve this.

I also reduced wait time to 2.5 seconds vs. the 5  seconds previously. Seemed to be a little long.