I want to disable the menu in Linux-Mint which is showing when you press ALT+1. I can't even capture the screen when the menu is showing so I've attached a photo. I tried everything and I didn't find the answer how to disable it. Any sugestions?
The solution posted below by @tohuwawohu works perfect on Linux Mint 15 and 16, but doesn't work on my computer with Mint 13 (Maya). I'm still looking for a way to disable the menu.