message: Update tabIndex on cancel button
diff: @@ -22,7 +22,7 @@ const ModalDialog = (props) => {
  </DialogContent>
  <DialogActions>
  - <Button color="primary" onClick={onDismiss}> Cancel </Button>
  + <Button color="primary" onClick={onDismiss} tabIndex={-1}> Cancel </Button>
  <Button color="primary" onClick={onAccept}> OK </Button>
  </DialogActions>
  </Dialog>
  