backend cpanel section icon tooltip display error

-- HikaShop version -- : 2.4.0
-- Joomla version -- : 3.4.1
-- PHP version -- : 5.3.29
-- Browser(s) name and version -- : Firefox 39.0a2

my admin language is chinese (zh-TW)
in backend hikashop index page cpanel section,
icon tooltip will not correct show ,
I edit code in
/administrator/components/com_hikashop/views/dashboard/tmpl/cpanel.php
---
<a class="<?php echo $tooltip_class; ?>" href="<?php echo $btn;?>" title="<?php echo htmlentities($desc); ?>">
--
to
--
<a class="<?php echo $tooltip_class; ?>" href="<?php echo $btn;?>" title="<?php echo htmlentities($desc, ENT_QUOTES, "UTF-8"); ?>">
--