### Preflight Checklist
<!-- Please ensure you've completed the following steps by replacing [ ] with [x]-->

* [x] I have read the [Contributing Guidelines](https://github.com/electron/electron/blob/master/CONTRIBUTING.md) for this project.
* [x] I agree to follow the [Code of Conduct](https://github.com/electron/electron/blob/master/CODE_OF_CONDUCT.md) that this project adheres to.
* [x] I have searched the issue tracker for an issue that matches the one I want to file, without success.

### Issue Details

* **Electron Version:**
  * 8.0.0
* **Operating System:**
  * Windows 10 Pro (1709)

### Expected Behavior
Using Notification API in main process with `timeoutType: 'never` I expected that the notification disappears only when the user clicks on it.  

### Actual Behavior
After few seconds the notification disappers.

### To Reproduce

```
  const newNotification = new Notification({title: 'I am a main process Notification!', timeoutType: 'never'})
  newNotification.show()
```

```sh
$ git clone https://github.com/p-fusi/electron-quick-start -b master
$ npm install
$ npm run start
```


shell/browser/notifications/win/windows_toast_notification.cc
ABI::Windows::UI::Notifications::IToastNotification* toast) {
  if (FAILED(toast->remove_Activated(activated_token_)))
    return false;
  if (FAILED(toast->remove_Dismissed(dismissed_token_)))
    return false;
  return SUCCEEDED(toast->remove_Failed(failed_token_));
}
/*
/ Toast Event Handler
*/
ToastEventHandler::ToastEventHandler(Notification* notification)
    : notification_(notification->GetWeakPtr()) {}
ToastEventHandler::~ToastEventHandler() {}
IFACEMETHODIMP ToastEventHandler::Invoke(
    ABI::Windows::UI::Notifications::IToastNotification* sender,
    IInspectable* args) {
  base::PostTask(
      FROM_HERE, {content::BrowserThread::UI},
      base::BindOnce(&Notification::NotificationClicked, notification_));
  if (IsDebuggingNotifications())
    LOG(INFO) << "Notification clicked";
  return S_OK;
}
IFACEMETHODIMP ToastEventHandler::Invoke(