Unfortunatly, you can't. you just haveto wait it out. I did the same thing...
I'm having the same issue now...counted down to 0, then all tickets put into cart. I got everything I wanted. But says my wishlist is still processing. WTF.
Guess we'll have to hope it doesn't take 2 hours to process the 4000 in the list again now.
You can hit refresh at any time your wish list is processing, to reset the two hour timer.
To behonest I don't know why they put a "Submit Wishlist for Processing" button on the summary page you get after your wishlist has been processed. I saw the big green button and clicked it thinking it was going to take me to my cart. Now I am waiting in line for the system to process my wishlist again...
Great! Glad it worked out. :)