Slug field: execute `generate` on every save to ensure valid slugs

[JohannaPeanut]

Hi It's nice that we can give the user control over slugs, that makes sense in some places. But it would be very helpful if generate is not only executed on "Regenerate"-Click but also on every save. I had assumed that this would happen, but unfortunately the CMS user can "break" the slug with spaces, non-alphanumeric characters etc.

[henri42]

Hi ! I had the same issue with a CMS user who broke his home page for this reason (whitespace and comma in a slug). Maybe a validation property on fields.slug to reject slugs containing whitespaces or special chars could do the trick ?