Revert "[mu-plugins/EPFL-SC-grid] Improve shortcode markup"
Revert "[mu-plugins/EPFL-SC-grid] Improve shortcode markup"

This reverts commit b37d2ac10793c43c32e8df24c9dfdbd89e80b98a.

epfl-idevelop/jahia2wp,epfl-idevelop/jahia2wp,epfl-idevelop/jahia2wp,epfl-idevelop/jahia2wp