MD Settings: make custom UIs look "actionable"

chrome/browser/resources/settings/internet_page/network_proxy_exclusions.html

 <link rel="import" href="chrome://resources/cr_elements/icons.html">
 <link rel="import" href="chrome://resources/html/polymer.html">
+<link rel="import" href="/settings_root_css.html">
 
 <dom-module id="network-proxy-exclusions">
   <template>
     <style>
       span {
         margin: 5px;
       }
 
       iron-icon {
+        @apply(--settings-actionable);
         margin: 5px;
       }
 
       div#container {
         border: 1px solid lightgrey;
         height: 100px;
         margin: 5px;
         overflow-y: auto;
       }
     </style>
     <div id="container" class="layout vertical">
       <template is="dom-repeat" items="[[exclusions]]">
         <div class="layout horizontal">
           <span class="flex">[[item]]</span>
-          <iron-icon icon="cr:clear" on-tap="onRemoveTap_">
-          </iron-icon>
+          <iron-icon icon="cr:clear" on-tap="onRemoveTap_"></iron-icon>
         </div>
       </template>
     </div>
   </template>
   <script src="network_proxy_exclusions.js"></script>
 </dom-module>