fa -> 4.5

site.xml

@@ -10,7 +10,7 @@
             <text>
                 <locale group="quiqqer/bricks" var="site.panel.bricks.category.title" />
             </text>
-            <image>icon-th</image>
+            <image>fa fa-th</image>
             <onload require="package/quiqqer/bricks/bin/Site/Category"></onload>
         </tab>
     </window>