I had a problem earlier in the month and resulted in a few of the default apps removed -including Unity, and settings changed. I have restored some of them but there is one that is still bothering me. The printer icon that has to be found in "Settings/Hardware" is missing. I manage the device through HPlip but it always showed in that menu. The printer is working and detected as an active USB connection on lsusb. How can I restore this icon in "Settings"?