Add timestamps to prevent browser caching on help lightboxes.

themes/bootstrap3/templates/footer.phtml

@@ -19,7 +19,7 @@
   <div class="col-sm-4">
     <p><strong><?=$this->transEsc('Need Help?')?></strong></p>
     <ul>
-      <li><a href="<?=$this->url('help-home')?>?topic=search" data-lightbox class="help-link"><?=$this->transEsc('Search Tips')?></a></li>
+      <li><a href="<?=$this->url('help-home')?>?topic=search&_=<?=time() ?>" data-lightbox class="help-link"><?=$this->transEsc('Search Tips')?></a></li>
       <li><a href="#"><?=$this->transEsc('Ask a Librarian')?></a></li>
       <li><a href="#"><?=$this->transEsc('FAQs')?></a></li>
     </ul>

themes/bootstrap3/templates/search/advanced/layout.phtml

@@ -187,8 +187,8 @@
         <div class="sidegroup">
           <h4><?=$this->transEsc("Search Tips")?></h4>
           <div class="list-group">
-            <a class="list-group-item help-link" data-lightbox href="<?=$this->url('help-home')?>?topic=advsearch"><?=$this->transEsc("Help with Advanced Search")?></a>
-            <a class="list-group-item help-link" data-lightbox href="<?=$this->url('help-home')?>?topic=search"><?=$this->transEsc("Help with Search Operators")?></a>
+            <a class="list-group-item help-link" data-lightbox href="<?=$this->url('help-home')?>?topic=advsearch&_=<?=time() ?>"><?=$this->transEsc("Help with Advanced Search")?></a>
+            <a class="list-group-item help-link" data-lightbox href="<?=$this->url('help-home')?>?topic=search&_=<?=time() ?>"><?=$this->transEsc("Help with Search Operators")?></a>
           </div>
         </div>
       </div>