Bugfix: Make sure the slug is not recreated on every save.
Bugfix: Make sure the slug is not recreated on every save.

Without validation for the existing value the field
would be recreated on every save. Now once the slug exist
the field won't try to generate a new one.

us-ignite/us_ignite,us-ignite/us_ignite,us-ignite/us_ignite,us-ignite/us_ignite,us-ignite/us_ignite