add normalization of seeds, better JA support

public/views/backup.html

@@ -75,9 +75,7 @@
     <div class="row enable_text_select" ng-show="show">
         <div class="small-centered p10t p10b large-centered medium-centered large-8 medium-8 small-10 columns enable_text_select" style="border:1px solid gray; background:#eee;
 ">
-          <span ng-repeat="word in wordsC.mnemonicWords">
-            {{word}} 
-          </span> 
+          <span ng-repeat="word in wordsC.mnemonicWords"><span style="white-space:nowrap">{{word}}</span><span ng-show="index.defaultLanguageIsoCode == 'ja'">&#x3000;</span> </span>  
         </div>
 
         <div class="box-notification large-centered medium-centered small-centered large-8 medium-8 small-10 columns m10t" ng-show="wordsC.mnemonicHasPassphrase">
@@ -89,10 +87,6 @@
           </span>
         </div>
 
-
-
-
-
         <div class="m10 text-center columns">
           <div class="m10 size-14 text-gray">
             <span translate>

public/views/preferences.html

@@ -55,12 +55,6 @@
       <span translate>Backup</span>
     </li>
  
-    <h4 class="title m0">&nbsp;</h4>
-    <li class="line-b p20" ng-click="$root.go('export')" ng-hide="preferences.externalIndex >= 0">
-      <i class="icon-arrow-right3 size-24 right text-gray"></i>  
-      <span translate>Export</span>
-    </li>
- 
     <li class="line-b p20" ng-click="$root.go('preferencesAdvanced')">
       <i class="icon-arrow-right3 size-24 right text-gray"></i>  
       <span translate>Advanced</span>