[Feature request] Be able to deleted articles rather than archive them

I only use Wallabag as a read-it-later app. As such, I don't nee to keep track of read articles. Current application makes archiving the default action when an article is read. It would be nice to also be able to delete them.

At the bottom, there are 2 or 3 buttons : one to archive the article, and one or to for navigating to next and, when possible, previous article. This feature can take 2 shapes:

- an option to delete articles rather than archive them, then the archive button would be replace by a delete button when activated
- a deletion button next to the archive button.

I don't have any preferences.

Also, long click on an article should display some managment options (archive, delete, other?). This has become a standard now in mobile navigation and I was suprised long-click does not do anything in Wallabag.