message: Start timer when press Enter in duration field (mac)
diff: @@ -302,6 +302,9 @@ class TimerViewController: NSViewController {
  private func durationControl(doCommandBy commandSelector: Selector) -> Bool {
  if commandSelector == #selector(insertNewline(_:)) {
  view.window?.makeFirstResponder(nil)
  + if !viewModel.isRunning {
  + viewModel.startStopAction()
  + }
  }
  return false
  