After the removal of categories that were matching the p4_page_type we found out that the press center page does not show press releases.

This was happening because the coupling was not based on the p4_page_type, but on the category. (Which we missed when we listed all the couplings of category<->p4_page_type

Fix: Introduce checkboxes for selecting p4_page_type in the articles block (like we have in content four column)