I found this code on wordpress.org. You said: "To install, I would create a file in mu-plugins named jetpack-tweaks.php and add the code. While there is a chance that this tweak could break after an upgrade, it is unlikely and won't negatively impact your site" What is mu when you say mu-plugins? And can this be placed in the functions php file instead? If not could you be more specific as to where to place it?