change col-xs to col-sm

src/server/views/widget/forbidden_content.html

@@ -13,7 +13,7 @@
   > <!-- TODO Delete "content-main-not-found"-->
 
   <div class="row row-alerts">
-          <i class="icon-fw icon-lock" aria-hidden="true"></i> Browsing of this page is restricted <!-- TODO #5 Reaserach about the icons -->
+    <div class="col-sm-12">
         <p class="alert alert-primary py-3 px-4">
           <i class="icon-fw icon-lock" aria-hidden="true"></i> Browsing of this page is restricted
         </p>