Aborting install after multimedia codec installation requested blocks live boot.

[Ubergeekian]

To reproduce:

• Boot the live version and start the installer on a system with Secure Boot enabled
• Tick the checkbox for multimedia codecs (and choose a password)
• Set other options and then start to choose a disk partitioning scheme
• Decide to stop the installation for whatever reason (in my case to find out how big an EFI partition should be)
• Restart the process
• Discover that you can no longer boot the live version because when you ticked the multimedia codecs checkbox the computer was told that mmx64.efi was needed, but this is only - it seems - available on a full install and not on the live version

It seems like a very bad idea indeed to have the installer modify anything on the system before installation is confirmed and started.