code: function(e) {
  		gui.Key.ctrlDown = e.ctrlKey;
  		gui.Key.shiftDown = e.shiftKey;
  		gui.Key.altDown = e.altKey;
  		gui.Key.metaDown = e.metaKey;
  	}
docs: Update key modifiers state.
  @TODO Cross platform abstractions "accelDown" and "accessDown"
  @param {KeyEvent} e