Meta keywords capitalize

[Cravenkiss]

Hi, 

We are using meta keywords for something else, not really SEO, but I would like to know if it's possible to make the meta keywords text capitalized instead of lowercase please. In the image the text becomes lowercase when saved. My prestashoip version is 1.6.1.5.

I tried to make some changes  on line 103 of the file admin/tabs/AdminProducts.php but it ain't working.

$_POST['meta_keywords_'.$language['id_lang']] = $this->_cleanMetaKeywords(Tools::strtolower($_POST['meta_keywords_'.$language['id_lang']])); // preg_replace('/ *,? +,* /', ',', strtolower($_POST['meta_keywords_'.$language['id_lang']]));

Any help would be greatly appreciated.

Thank you.