Apparently Steam + Y is a bad shortcut because on external controllers it shuts the controller off. Also if someone is using the nintendo layout then it opens the keyboard (because the button code remains 4 but it changes from Y to X). I have changes this to Steam + Start which as best as I know has no other conflicts. Verbiage and screenshot has been updated as well.
Screenshot format has been changed to png and all references have been updated. Apparently the store can only load png screenshots.
Small change: