config_service: release the UI to the front page

appengine/config_service/ui/src/config-ui/config-set.html

 <!--
   Copyright 2017 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.
 -->
 
 <link rel="import" href="config-file-card.html">
 <link rel="import" href="../../bower_components/iron-ajax/iron-ajax.html">
 <link rel="import" href="../../bower_components/iron-icons/iron-icons.html">
 <link rel="import" href="../../bower_components/paper-item/paper-item.html">
 <link rel="import" href="../../bower_components/paper-spinner/paper-spinner.html">
 <link rel="import" href="../../bower_components/polymer/polymer.html">
 <link rel="import" href="../../bower_components/iron-icons/maps-icons.html">
 <link rel="import" href="../../bower_components/paper-tooltip/paper-tooltip.html">
 
 <dom-module id="config-set">
   <template>
     <style>
       .spinner {
         text-align: center;
       }
 
       .category {
         font-size: 100%;
         font-family: sans-serif;
       }
 
       .center {
-        width: 20%;
+        width: 550px;
         margin: auto;
         text-align: left;
       }
 
       .config-card { 
         padding-bottom: 1%;
         animation: fadein 1.5s;
       }
 
       @keyframes fadein {
@@ skipping 204 matching lines @@
         this.isLoading = false;
       },
 
       _onRefreshError: function() {
         this.isRefreshing = false;
         this.refreshMessage = "Error: Files could not be refreshed.";
       }
     });
   </script>
 </dom-module>