explicitly hide tooltip content before deleting in case object is not able to be deleted (prevents giant tooltip image from getting stuck on canvas)

SVN revision: 61661

legacy/elementary/src/lib/els_tooltip.c

@@ -137,6 +137,7 @@ _elm_tooltip_content_del(Elm_Tooltip *tt)
    evas_object_event_callback_del_full
      (tt->content, EVAS_CALLBACK_DEL,
       _elm_tooltip_content_del_cb, tt);
+   evas_object_hide(tt->content);
    evas_object_del(tt->content);
    tt->content = NULL;
 }