Fix the usage of Preview on public pages

app/views/page.tpl

@@ -55,8 +55,11 @@
         </div>
         <?php $this->widget('Dialog');?>
         <?php $this->widget('Drawer');?>
-        <?php $this->widget('Preview');?>
         <?php $this->widget('Confirm');?>
+
+        <?php if (!$this->public) { ?>
+            <?php $this->widget('Preview');?>
+        <?php } ?>
         <%content%>
     </body>
 </html>

app/widgets/Post/_post.tpl

@@ -256,10 +256,12 @@
         </ul>
         <ul class="grid active">
             {loop="$post->pictures"}
-                <li style="background-image: url('{$value->href|protectPicture}')"
+                <li
                     {if="$public"}
+                        style="background-image: url('{$value->href}')"
                         onclick="window.location.href = '{$value->href}'"
                     {else}
+                        style="background-image: url('{$value->href|protectPicture}')"
                         onclick="Preview_ajaxShow('{$value->href}')"
                     {/if}
                 >