How to add Bootstrap's .center-block?

[eugenefedoto]

I started PrestaShop yesterday. For the top bar that has the logo, search, and cart: I removed the search, then the cart shifted to the center column. Now I want to add center-block so the logo shifts from left to center column, and the cart shifts from center to right column.

 

Edit: When I edit /mytheme/header.tpl, nothing happens. I can delete the header.tpl file and nothing on the page changes. In my settings show I'm using my theme.

Edited October 2, 2015 by eugenefedoto (see edit history)

[eugenefedoto]

I figured it out. I had to enable compile for template files under Advanced Parameters -> Performance.