Fixed custom SortableGridView id bug

Changed the id in the registerWidget function. Now you can set a custom
id in the options of SortableGridView widget as you can do with the
standard GridView.

Author: randycoder

SortableGridView.php

@@ -36,7 +36,7 @@ public function run()
     protected function registerWidget()
     {
         $view = $this->getView();
-        $view->registerJs("jQuery('#{$this->id}').SortableGridView('{$this->sortableAction}');");
+        $view->registerJs("jQuery('#{$this->options['id']}').SortableGridView('{$this->sortableAction}');");
         SortableGridAsset::register($view);
     }
 }