body.phtml: img urls are now allowed in icon()

No no more need for ../ hacks :)

application/layouts/scripts/body.phtml

@@ -25,14 +25,14 @@ if ($this->layout()->autorefreshInterval) {
       'dashboard',
       null,
       array(
-        'icon'              => '../logo_icinga-inv.png',
+        'icon'              => 'img/logo_icinga-inv.png',
         'data-base-target'  => '_main',
         'aria-hidden'       => 'true',
         'tabindex'          => -1
       )
     ); ?>
   <?php else: ?>
-    <?= $this->icon('../logo_icinga-inv.png'); ?>
+    <?= $this->icon('img/logo_icinga-inv.png'); ?>
   <?php endif ?>
   </div>
 </div>