adding delete words option to security Preferences

public/views/securityPreferences.html

@@ -0,0 +1,19 @@
+<div 
+  class="topbar-container" 
+  ng-include="'views/includes/topbar.html'"
+  ng-init="titleSection='Security'; goBackToState = 'preferences'">
+</div>
+
+
+<div class="content preferences" ng-controller="securityPreferencesController as security" >
+
+<h4></h4>
+
+<ul class="no-bullet m0" ng-show="!index.noFocusedWallet">
+
+  <li ng-click="$root.go('deleteWords')" ng-show ="!security.deleted">
+      <i class="icon-arrow-right3 size-24 right text-gray"></i>  
+      <div translate>Delete seed words</div>
+    </li>
+
+ </ul>