Default sanatize is prioritized over custom sanatize

[mm12]

On Windows, a number of characters are disallowed in paths. The program gets around this by replacing them with _. However, it does this before running the user's customBadChars. Ideally, I would like to be able to replace the disallowed characters with fullwidth variants. I would like to replace using these rules:

From	To
<	＜
>	＞
:	：
"	＂
|	｜
?	？
*	＊
/	／
[	【
]	】
(	（
)	）
#	♯
\\	＼

With the current program, this is impossible without modifications - which I don't mind since I need to override some things for Win32 long paths anyway.