minus sign implemetation on sjis

[Tatsuro M. <tma...@ya...>]

set minussign is a very nice new feature!
This is what I want to use for a long time!


In sjis encoding, minussign code is 0x817c.
This is a Japanese Kanji character with wide width.

From Ethan suggestion, I tried this in windows, qt, and wxt.
Looking are not good compared to those on utf8.

In addition using this option in sjis encoding, + character represent half width while 

- character represent full width.

The looking is not good.

In my opinion, it is better that this feature is not implemented in sjis encoding.
Utf8 is now widely used even on windows in Japanese. 

Therefore Japanese people who want to use this feature will use utf8 encoding 

if this feature will dropped on sjis encoding.   


Tatsuro