Add task-list summary

appengine/swarming/ui/res/imp/botlist/bot-list.html

 <!--
   Copyright 2016 The LUCI Authors. All rights reserved.
   Use of this source code is governed under the Apache License, Version 2.0
   that can be found in the LICENSE file.
 
   This in an HTML Import-able file that contains the definition
   of the following elements:
 
     <bot-list>
 
@@ skipping 79 matching lines @@
             special_columns="[[_specialColumns]]"
 
             columns="{{_columns}}"
             query_params="{{_query_params}}"
             filter="{{_filter}}"
             verbose="{{_verbose}}">
           </bot-filters>
 
           <bot-list-summary
             auth_headers="[[_auth_headers]]"
-            busy="{{_busy3}}"
             columns="[[_columns]]"
             count_params="[[_query_params]]"
             fleet="[[_fleet]]"
-            filtered_bots="[[_filteredSortedItems]]"
+            num_bots="[[_filteredSortedItems.length]]"
             sort="[[_sortstr]]"
-            verbose="[[_verbose]]">
+            verbose="[[_verbose]]"
+
+            busy="{{_busy3}}">
           </bot-list-summary>
 
         </div>
 
         <bot-list-data
           id="data"
           auth_headers="[[_auth_headers]]"
           query_params="[[_query_params]]"
 
           busy="{{_busy1}}"
@@ skipping 569 matching lines @@
           return;
         }
         var url = "/api/swarming/v1/bots/list?" + sk.query.fromParamSet(this._query_params);
         this.$.page_bots.load(url,this._auth_headers);
       }
 
     });
   })();
   </script>
 </dom-module>