Fix modded player characters missing from new-u selection on existing saves 2

Most new player character mods seem to have a passage like below. Without changes they won't appear as an option  in new-u when you load a pre-existing savegame.

:: core character add lulu [initialize init_new]
(unless:$core_chars contains "lulu")[(set:$core_chars to it + (a:"lulu"))]

As a fix the below lines could be added to the above.

(unless:$available_dna contains "lulu")[(set:$available_dna to it + (a:"lulu"))]
(unless:$character_list contains "lulu")[(set:$character_list to it + (a:"lulu"))]

Alternatively, this mod fixes the issue for all modded in player characters that use the same "core  character add ______" passage. Examples include Lulu, Casey & Tiffany.