Hide slug button for non-admins

templates/forms/inputs/abstract/slug.html.twig

@@ -1,4 +1,4 @@
-{% if 'description' not in form.fields.hidden %}
+{% if 'slug' not in form.fields.hidden %}
     {% if col_width %}<div class="{{col_width}}">{% endif %}
         <div class="form-group">
             <label for="input-{{type}}-slug" class="control-label">{{field_name | default(translate('SLUG'))}}</label>
@@ -15,4 +15,6 @@
             </div>
         </div>
     {% if col_width %}</div>{% endif %}
+{% else %}
+<input type="hidden" id="input-{{type}}-slug" name="slug" value="{{current_value}}">
 {% endif %}