Issue #2924063: Add liveblog page is not aligned with article design

[chrfritsch]

Make sure these boxes are checked before submitting your pull request - thank you!

• All coding styles are fulfilled. (How to check for cs issues?)
• All tests are running locally. (How to run the test?)
• Necessary update hooks are provided.
• User roles have correct access for new introduced permission.
• Every thunder module has a README.md in its root. Follow this guidelines, but we don't need every topic.
• Code is covered with well-balanced amount of inline comments.

If you are really awesome, then your feature is covered by additional tests. Well done!

[ol0lll]

Certainly looks better, anyhow I created a follow-up ticket in thunder_admin theme to address missing styles https://www.drupal.org/project/thunder_admin/issues/2924370
Also fixes https://www.drupal.org/project/liveblog/issues/2923389