Trigger article re-fetch from the app

# Issue details

This is a feature request: It would be useful to have an way, from the app, to trigger a re-fetch of the article content.

### Duplicate?
Have you searched the issues of this repository if your issue is already known? yes

### Actual behaviour
- n/a

### Expected behaviour
- An option in the article view to re-fetch the content of the current article.