Automatically select an SSH key
The refactor to make it possible to launch servers without having an SSH key also made it possible to launch a server without selecting an SSH key even when you have some. This confused a user who was used to just clicking 'launch' and with the defaults just working. She ended up with a server without an SSH key installed and she couldn't figure out why she couldn't connect.
I propose selecting the first SSH key by default if there are some.