In the purchase history on the mac app store, I noticed a little X appear next to the Install/Installed buttons. I pressed it and it removed the app from the list. It didn't remove the app from the computer, but it's gone from the list for what appears to be forever. Is there any way to get it back? I thought there would be an "are you sure" pop up or some sort of explanation of what it would do when i clicked the X, but it just vanished. Thanks!