I bought an App and it wasn't loading so I hit purchase again. I got a message that I had already purchased it so I hit cancel. But the icon had already started loading on my ipad. So I have a generic icon (no name, nothing) and it says "waiting" underneath with an empty progress bar. I've synched my iPad and it's still there. I can't find it in iTunes and when I click and hold so all the icons shake - they all come up with an "x" except this one. How can I delete this icon?