I encrypted my volume before installation and have added my user as FileVault user afterwards.
Now I can login with either the disk password or my user login password at the EFI (Filevault) login screen. (The former option sends me to the regular OS X login screen where I can again login as my user.)
How do I hide the disk password login option at the EFI login screen without enabling the input menu (com.apple.loginwindow showInputMenu -bool TRUE)?
In other words: How do I go from disk password-based encryption to login password-based encryption, at least cosmetically?
Is there maybe some option for com.apple.loginwindow that one can use? Can *.efires files be edited? Can Core Storage metadata for the volume somehow be edited?