Add the function to mass replace a keybind

[bephanten]

The function should find and replace all chosen keybind. Eg, replace all right win key with right alt. 

[JCTherik]

Yes.

Add in, "assign gear down binding across all modules."

[HC_Official]

this is the main reason I use joystick gremlin with a profile to convert button presses on a hotas to a keyboard press