If ace-window-mode is on when async-shell-command prompts for something, it will lock down emacs

[tusooa]

Steps to reproduce:

• Have a git repo in /path/to/repo with a remote set up to be an ssh remote and you have a ssh key that is password protected
• Run async-shell-command and type cd /path/to/repo; sleep 3; git push
• Immediately, call ace-window
• Wait for git to prompt you to enter the password for the ssh key
• Type anything will give you the error message [<key> is undefined], not even C-g or ESC ESC ESC can help.