Use new "get_user_access_roles" when showing a trait...* wqflask/wqflask/show_trait/show_trait.py
(ShowTrait): Replace `check_owner_or_admin` with
`get_user_access_roles`
* wqflask/wqflask/views.py
(show_temp_trait): Pass `user_id` as extra arg to ShowTrait.
(show_trait_page): Ditto.