* Move post-update a little earlier, and stop rebooting after the update completes as it should no longer be necessary.
* Migrate games from games-{internal,external} to games-{internal,external}/roms to allow upper/lower directory switching.
* If there is no defined upper setting, and there is an external card available, preference the card so modifications to /storage/roms are hosted there as expected.
* Corrects factory reset to ignore new games paths.
