Fixed issue 124, JS dropdown lists not working in Issues page under IE 7 & 8.

IE does not like trailing comma in an array.
Bad: [1, 2, 3,] Good: [1, 2, 3]

src/IDF/Views/Download.php

@@ -241,7 +241,7 @@ class IDF_Views_Download
             $auto .= sprintf('{ name: "%s", to: "%s" }, ',
                              Pluf_esc($d), Pluf_esc($v));
         }
-        return substr($auto, 0, -1);
+        return substr($auto, 0, -2);
     }
 
     /**