• Listens for one or multiple keyboard key and/or mouse button presses
• Executes actions on key/button press
• Add configuarable trigger cooldown after key/button press
• Add option to set the amount of needed presses in a specified time frame to trigger the actions (for double-click stuff, etc.)

Addition mentioned in #829 - allow the key listener to function outside of a menu via an option on a universal layout or something, basically just being able to use this in game for custom key binds. I would expect the ability to click a button, it listen for a keybind then set a keybind to the key pressed via the "change minecraft option value" function or "set variable value" function somehow, just like the vanilla options screen does but a lil' more custom.