Move error-toast up and make server details problems easy to see

appengine/swarming/ui/res/imp/tasklist/task-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:
 
     <task-list>
 
@@ skipping 13 matching lines @@
     None.
 -->
 
 <link rel="import" href="/res/imp/bower_components/iron-flex-layout/iron-flex-layout-classes.html">
 <link rel="import" href="/res/imp/bower_components/paper-button/paper-button.html">
 <link rel="import" href="/res/imp/bower_components/paper-button/paper-button.html">
 <link rel="import" href="/res/imp/bower_components/paper-dialog/paper-dialog.html">
 <link rel="import" href="/res/imp/bower_components/polymer/polymer.html">
 
 <link rel="import" href="/res/imp/common/dynamic-table-behavior.html">
-<link rel="import" href="/res/imp/common/error-toast.html">
 <link rel="import" href="/res/imp/common/pageable-data.html">
 <link rel="import" href="/res/imp/common/sort-toggle.html">
 <link rel="import" href="/res/imp/common/swarming-app.html">
 <link rel="import" href="/res/imp/common/task-behavior.html">
 <link rel="import" href="/res/imp/common/url-param.html">
 
 <link rel="import" href="task-filters.html">
 <link rel="import" href="task-list-data.html">
 
 <dom-module id="task-list">
@@ skipping 191 matching lines @@
 
     <paper-dialog id="prompt" modal on-iron-overlay-closed="_promptClosed">
       <h2>Are you sure?</h2>
       <div>Are you sure you want to [[_dialogPrompt]]?</div>
       <div class="buttons">
         <paper-button dialog-dismiss autofocus>No</paper-button>
         <paper-button dialog-confirm>Yes</paper-button>
       </div>
     </paper-dialog>
 
-    <error-toast></error-toast>
-
   </template>
   <script>
   (function(){
     var specialColumns = ["deduped_from", "name", "state", "bot", "source_revision"];
 
     // Given a time attribute like "abandoned_ts", humanTime returns a function
     // that returns the human-friendly version of that attribute. The human
     // friendly time was created in task-list-data.
     function humanTime(attr) {
       return function(task) {
@@ skipping 180 matching lines @@
         return task.tagMap[col];
       },
 
       _taskClass: function(task) {
         return this.stateClass(this._column("state", task));
       }
     });
   })();
   </script>
 </dom-module>