MD Settings: Internet: Add 'forget' button, more fixes.

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

 <link rel="import" href="chrome://resources/html/polymer.html">
 <link rel="import" href="chrome://resources/polymer/v1_0/iron-collapse/iron-collapse.html">
 <link rel="import" href="chrome://resources/polymer/v1_0/iron-flex-layout/classes/iron-flex-layout.html">
 <link rel="import" href="chrome://resources/polymer/v1_0/paper-button/paper-button.html">
 <link rel="import" href="chrome://resources/polymer/v1_0/paper-checkbox/paper-checkbox.html">
 <link rel="import" href="chrome://resources/polymer/v1_0/paper-icon-button/paper-icon-button.html">
 <link rel="import" href="chrome://resources/cr_elements/cr_expand_button/cr_expand_button.html">
 <link rel="import" href="chrome://resources/cr_elements/icons.html">
 <link rel="import" href="chrome://resources/cr_elements/network/cr_network_icon.html">
 <link rel="import" href="chrome://resources/cr_elements/network/cr_onc_types.html">
@@ skipping 60 matching lines @@
           </cr-network-icon>
           <div class="layout vertical">
             <div id="networkName">[[getStateName_(networkProperties)]]</div>
             <div id="networkState"
                 connected$="[[isConnectedState_(networkProperties)]]">
               [[getStateText_(networkProperties)]]
             </div>
           </div>
         </div>
         <div id="buttonDiv" class="layout horizontal center">
+          <paper-button class="secondary-button" on-tap="onForgetTap_"
+                        hidden$="[[!showForget_(networkProperties)]]">
+            Forget

[dschuyler, 2016/07/28 22:03:55]

I think we should $i18n{} the network settings
soon; and I don't want to muddle this CL with 
changing all of them, but can this entry be 
$i18n?

[stevenjb, 2016/07/28 22:15:50]

It's coming soon I promise. I'd really rather not do just this tiny bit.

+          </paper-button>
           <paper-button class="secondary-button" on-tap="onViewAccountTap_"
               hidden$="[[!showViewAccount_(networkProperties)]]">
             View Account
           </paper-button>
           <paper-button class="secondary-button" on-tap="onActivateTap_"
               hidden$="[[!showActivate_(networkProperties)]]">
             Activate
           </paper-button>
           <paper-button class="primary-button" on-tap="onConnectTap_"
               hidden$="[[!showConnect_(networkProperties)]]"
@@ skipping 107 matching lines @@
           <div class="subtitle">Proxy</div> 
           <network-proxy editable on-proxy-change="onProxyChange_"
               network-properties="[[networkProperties]]">
           </network-proxy>
         </div>
       </div>
     </iron-collapse>
   </template>
   <script src="internet_detail_page.js"></script>
 </dom-module>