[Pages listing] The default WF pages come without a slug

[tudoramariei]

Describe the bug
When going to view one of the published default pages (i.e., Home, T&C, Policy) from the page listing, you are directed to the public website by using the ID of the page instead of the slug. So, if the slug is /home and the page ID is 1, you should be directed to website-factory.test/en/home but are taken to website-factory.test/en/1, which does not exist.

This seems to happen because the generated pages do not have a slug themselves.

To Reproduce
Steps to reproduce the behavior:

1. Log into the admin interface of a new WF instance
2. Go to '/admin/pages'
3. Locate one of the published default pages (i.e., Home, T&C, Policy) before they are modified
4. Click on the down arrow next to a page
5. Click on View/Vezi
6. You are directed to a 404 page with the URL <wf-host>/<lang>/<id>

Expected behavior
You should be directed to a page with the slug <wf-host>/<lang>/<slug>

Screenshots
Clicking on the view button...

... directs you to an address with the page ID...