Slug validation error during module installation

[themreza]

When installing graphql_vuestorefront, it attempts to validate the website slug for an ir.ui.view record corresponding to graphql_vuestorefront/views/product_views.xml.

However, the check doesn't take into account records that don't have a slug (self.website_slug being False) and prevents installation, stating the slug is already in use.

I had to add if self.website_slug at the beginning to bypass the error.

https://github.com/odoogap/vuestorefront/blob/14.0/graphql_vuestorefront/models/product.py#L25