Make TaskList use Dynamic List

appengine/swarming/elements/res/imp/common/swarming-app.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:
 
     <swarming-app>
 
@@ skipping 74 matching lines @@
       }
     </style>
     <app-header-layout>
       <app-header fixed>
         <app-toolbar>
           <div class="title left">[[name]]</div>
           <paper-spinner-lite class="left" active="[[busy]]"></paper-spinner-lite>
 
           <a class="left" href="/newui/">Home</a>
           <a class="left" href="/newui/botlist">Bot List</a>
+          <a class="left" href="/newui/tasklist">Task List</a>
           <div class="flex"></div>
           <auth-signin
               class="right"
               client-id="[[client_id]]"
               auth-headers="{{auth_headers}}"
               signed-in="{{signed_in}}">
           </auth-signin>
         </app-toolbar>
       </app-header>
       <div class="main-content">
@@ skipping 57 matching lines @@
         var result = false;
         // can't use .foreach, as arguments isn't really an Array.
         for (var i = 0; i < arguments.length; i++) {
           result = result || arguments[i];
         }
         return result;
       },
     };
   })();
 </script>