refactor navigation parameters

public/views/termsOfUse.html

@@ -1,12 +1,10 @@
 <ion-view>
-  <ion-nav-bar class="bar-stable">
-   <ion-nav-title>Terms of Use</ion-nav-title>
-   <ion-nav-buttons side="primary">
-     <button class="button no-border" ui-sref="settings.about">
-       <i class="icon ion-chevron-left"></i> Back
-     </button>
-   </ion-nav-buttons>
+  <ion-nav-bar>
+    <ion-nav-back-button>
+      {{'Back' | translate}}
+    </ion-nav-back-button>
   </ion-nav-bar>
+  
   <ion-content ng-controller="termOfUseController" cache-view="false">
   <p>
   	<div ng-include="'views/includes/terms.html'"></div>