Move customCodes.json to data/customCodes.json on startup

[liquidnya]

Move ./customCodes.json to ./data/customCodes.json on startup, only if ./customCodes.json exists.
Then change the read and write location of custom codes to ./data/customCodes.json.
Also use the prettySaveFiles variable for the custom codes.

[liquidnya]

Maybe converting the list of tuples to an object could also be an option.

[liquidnya]

Maybe converting the list of tuples to an object could also be an option.

And also adding a version field to ./data/customCodes.json too.