Product page thumbnails grid modification

[speed3r]

Hello,

 

I'm looking for a way to change standard thumbnails list with simpler one, without slide feature - just a grid with several columns and rows. However, I need to get rid of "display: list-item" attribute which is added to every list element in ul#thumbs_list_frame and I can't find place where it's declared.

 

<li id="thumbnail_27477" style="display: list-item;">

 

It doesn't appear in product.tpl:

<li id="thumbnail_{$image.id_image}">

 

So I guess it has to be somewhere in javascript files. I've been "grep-ing" *.js files to find that attribute, without luck.

 

Can anyone tell me where to look for it? I'm using custom version of prestashop default theme.