Rename "Periphery" to "Peripheral" in Input Menu

[ptigoe]

I believe "Peripheral" would be a clearer name than "Periphery" for the setting that allows Zapper setup.

While trying to get a GunCon 3 working, I totally overlooked this menu item, thinking it would be about the area surrounding the screen. After digging into the core docs, I realized it might actually mean "Peripheral" and was able to get the GunCon 3 working.

https://www.merriam-webster.com/dictionary/periphery
https://www.merriam-webster.com/dictionary/peripheral

(Big thanks for developing this. My son loves it.)

[goofyseeker311]

more importantly, make the periphery work, like joysticks in duck hunt. so far I can get only mouse and mouse click to work. why is zapper trigger on separate setting. I mean Periphery: Zapper(Joy) does not work with duck hunt.