Also, I couldn't find a way to get rid of the big grey 'Send to this address to play for real BTC!' box
Once I did get rid of the box, the 'click to refresh balance' popup appeared. It stayed up as I moused over the 'add btc' button, leading to this ugly mess:

It would be better to close the other popup before opening the new one, so only 1 ever shows up at a time.