Add D-Pad support for Xbox Controller Keybinds

I'm happy that I can use my controller buttons for Push to Talk, but all the buttons are usually in use in the games I'm playing while using push to talk. The exception to that rule is the D-Pad, but the D-Pad buttons aren't detected by the interface. (same with the triggers but that I can see being less of an issue)

Would enjoy being able to use the D-PAD for push to talk.