Crashes minecraft and imgui when eitther one of the mouse or keybord selections are invalid

[whyvn]

If you try to open a map when the input devices are invalid i.e. probably not in the list of input devices /dev/input/by-id/*-kbd, the game will crash with an unknown error as well as the imgui "Phantom Injector" window that opens upon a successful injection. I'm gonna try to make a pr to select an input device from a key press or button click since it would fix the issue and make it more user friendly.