Before:

This <div id="new-article"> is missed, when no article is in the list and only the alert is shown.
This blue alert is shown, when articles are listed

Changes proposed in this pull request:

• added the missed <div> into the section with the alert

How to test the feature manually:

1. go to normal view or reader view
2. all articles are read
3. wait till new articles in background are fetched (maybe a cron job is needed)
4. see the blue alert

Pull request checklist:

• clear commit messages
• code manually tested