the in game hotkey may work.
my players were asking for 2 hotkeys for the same button; in this case it was a build unit button. If i stack two button within a command card slot, only the top button is active.
I still do not think its possible to do in data.
Perhaps in triggers as an trig event, i'm not sure. I was curious to see if it was at all possible in data, or if anyone has succeeded in doing something like this