auth_service: Fetch revisions of all configs (for UI) at once.

appengine/components/components/auth/ui/templates/oauth_config.html

 {% extends 'auth/base.html' %}
 {% block content %}
 
 {% set is_readonly = auth_service_config_locked or not is_admin %}
 <div class="row">
   <div class="col-md-12">
     <div class="panel panel-default">
       <div class="panel-heading"><h3 class="panel-title">OAuth and token server config</h3></div>
       <div class="panel-body">
         <div id="oauth-config-alerts"></div>
@@ skipping 72 matching lines @@
               <input type="text" class="form-control"
                      {% if is_readonly %}readonly{% endif %}
                      name="token_server_url" placeholder="Not set">
             </div>
           </div>
           <hr>
 
           <div class="form-group">
             {% if auth_service_config_locked %}
               <div class="col-sm-12">
-                {{ render_config_locked() }}
+                {{ render_config_locked("oauth.cfg") }}
               </div>
             {% else %}
               {% if is_admin %}
               <div class="col-sm-offset-2 col-sm-10">
                 <button type="submit" class="btn btn-primary">Submit</button>
               </div>
               {% endif %}
             {% endif %}
           </div>
         </form>
       </div>
     </div>
   </div>
 </div>
 
 {% endblock content %}