Fixed missing index for fieldsets

Signed-off-by: snipe <snipe@snipe.net>

app/Http/Controllers/CustomFieldsetsController.php

@@ -23,6 +23,12 @@ use Redirect;
 class CustomFieldsetsController extends Controller
 {
 
+    public function index() 
+    {
+        return redirect()->route("fields.index")
+        ->with("error", trans('admin/custom_fields/message.fieldset.does_not_exist'));
+    }
+
     /**
      * Validates and stores a new custom field.
      *