[MD settings] tweaks to what is shown in about page; and css cleanup

chrome/browser/resources/settings/bluetooth_page/bluetooth_page.html

 <link rel="import" href="chrome://resources/cr_elements/cr_scrollable_behavior.html">
 <link rel="import" href="chrome://resources/cr_elements/policy/cr_policy_pref_indicator.html">
 <link rel="import" href="chrome://resources/html/i18n_behavior.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/iron-list/iron-list.html">
 <link rel="import" href="chrome://resources/polymer/v1_0/neon-animation/neon-animatable.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-toggle-button/paper-toggle-button.html">
 <link rel="import" href="/icons.html">
 <link rel="import" href="/settings_page/settings_animated_pages.html">
 <link rel="import" href="/settings_shared_css.html">
 <link rel="import" href="bluetooth_device_dialog.html">
 <link rel="import" href="bluetooth_device_list_item.html">
 
 <dom-module id="settings-bluetooth-page">
   <template>
     <style include="settings-shared">
-      iron-icon {
-        -webkit-margin-end: var(--iron-icon-spacing);
-      }
-
       cr-expand-button {
         -webkit-margin-end: 10px;
       }
 
       #deviceList {
         max-height: 300px;
         overflow-y: auto;
       }
 
       .no-devices {
         min-height: var(--settings-row-min-height);
       }
 
       settings-bluetooth-add-device-dialog,
       settings-bluetooth-pair-device-dialog {
         height: 400px;
         padding: 0;
         width: 500px;
       }
     </style>
     <settings-animated-pages id="pages" section="bluetooth">
       <neon-animatable route-path="default">
         <div class="settings-box first">
-          <div class="layout horizontal center flex">
-            <iron-icon icon="settings:bluetooth"></iron-icon>
-            <span class="flex">$i18n{bluetoothEnable}</span>
-            <cr-expand-button id="expandListButton"
-                alt="$i18n{bluetoothExpandA11yLabel}"
-                hidden$="[[!bluetoothEnabled]]"
-                expanded="{{deviceListExpanded}}">
-            </cr-expand-button>
-            <paper-toggle-button id="enableBluetooth"
-                checked="{{bluetoothEnabled}}"
-                disabled="[[!adapterState.available]]"
-                on-change="onBluetoothEnabledChange_">
-            </paper-toggle-button>
-            <cr-policy-pref-indicator
-                pref="[[prefs.cros.device.allow_bluetooth]]"
-                hidden="[[prefs.cros.device.allow_bluetooth.value]]">
-            </cr-policy-pref-indicator>
-          </div>
+          <iron-icon icon="settings:bluetooth"></iron-icon>
+          <span class="middle">$i18n{bluetoothEnable}</span>
+          <cr-expand-button id="expandListButton"
+              alt="$i18n{bluetoothExpandA11yLabel}"
+              hidden$="[[!bluetoothEnabled]]"
+              expanded="{{deviceListExpanded}}">
+          </cr-expand-button>
+          <paper-toggle-button id="enableBluetooth"
+              checked="{{bluetoothEnabled}}"
+              disabled="[[!adapterState.available]]"
+              on-change="onBluetoothEnabledChange_">
+          </paper-toggle-button>
+          <cr-policy-pref-indicator
+              pref="[[prefs.cros.device.allow_bluetooth]]"
+              hidden="[[prefs.cros.device.allow_bluetooth.value]]">
+          </cr-policy-pref-indicator>
         </div>
         <iron-collapse opened="[[canShowDeviceList_(bluetoothEnabled,
                                                     deviceListExpanded)]]">
           <div id="deviceList" class="list-frame vertical-list"
               on-device-event="onDeviceEvent_">
             <div id="container" class="layout vertical" scrollable>
               <iron-list items="[[getPairedOrConnecting_(deviceList.*)]]"
                   selection-enabled selected-item="{{selectedItem}}"
                   scroll-target="container">
                 <template>
@@ skipping 27 matching lines @@
           on-device-event="onDeviceEvent_"
           on-response="onResponse_"
           pairing-device="[[pairingDevice]]"
           pairing-event="[[pairingEvent]]">
       </bluetooth-device-dialog>
     </template>
 
   </template>
   <script src="bluetooth_page.js"></script>
 </dom-module>