Help! A few weeks ago, I installed 8.04. At one point while getting everything working, I did an auto update command, and it started removing what I thought was a LOT of packages (including all of the ubuntustudio packages which I use). I cancelled it, and now I can't edit my main menu. Double-clicking does nothing, right-clicking does nothing. Attached is a screenshot - maybe someone can tell me what package I lost??? Thanks!