message: add currentCommand index to initial state
diff: @@ -29,6 +29,7 @@ const mapStateToProps = (state) => {
  // protocol
  protocolName: robotSelectors.getProtocolName(state),
  commands: robotSelectors.getCommands(state),
  + currentCommand: robotSelectors.getCurrentCommand(state),
  runProgress: robotSelectors.getRunProgress(state),
  // TODO(mc): remove development hardcoded values
  