- don't use a reserved name (starting with an underscore)
- use a file-local mangled name (starting with two underscores
- use renpy.dynamx to cleanup the variable automatically
(cherry picked from commit 3e86094b0b)
* Added parcel callback support for the outfit store
* Added execute_callback wrapper function
* Fixed ball quest item never unlocking after receiving the outfit, soft-locking the game
* Fixed and replaced getattr methods in some instances referencing character states
* Fixed get_character_unlock, and get_character_mood referencing wrong var and store
* Fixed lint self defining character tag instead of using a global func
