Add Yu Gothic UI to font-family jp

[harujii]

Fix #79579
Prioritize Yu Gothic UI over Meiryo.

[msftclas]

All CLA requirements met.

[octref]

It needs to be Yu Gothic, not Yu Gothic UI, which has the condensed kana:

Yu Gothic:

Yu Gothic UI:

But I just checked, currently for lang="ja", we are falling back to Yu Gothic on Windows 10, which is Chrome's default choice for Japanese characters. Here's stable:

[harujii]

@octref
Yu Gothic is not suitable for UI text and not familiar to Japanese as a UI font.
Is there any reason why vscode don't use the condenced font?

The reason to falling back to Yu Gothic is that probably don't have Meirio installed on your PC.
Meiryo is supplemental font for japanese.
To use it, install the Japanese language pack on your PC.
see also: https://docs.microsoft.com/en-us/typography/fonts/windows_10_font_list

[octref]

Is there any reason why vscode don't use the condenced font?

I don't know. It has been there forever. If there's a good reason we can probably change it.

The reason to falling back to Yu Gothic is that probably don't have Meirio installed on your PC.
Meiryo is supplemental font for japanese.

Thanks! I feel our Japanese font stack should be consistent, either all using the UI condensed kana versions, or all using the wide normal versions. I have reached out to a few Japanese users to gather feedback. This would be a very drastic change to Japanese users so we need to be more careful.

[bpasero]

@octref thanks for doing that, let's wait for more feedback.

[octref]

A bit more testing:

Win 10 defaults to Yu Gothic UI (narrow):

macOS defaults to Hiragino Kaku Gothic ProN (wide):

Anyway, I throw out a Twitter poll for 7 days:

https://twitter.com/octref/status/1169661657900961792

[octref]

The feedback so far heavily leans towards the narrower one.
@harujii I'd be fine if you also make Meiryo -> Meiryo UI change.

This should only affect Windows Japanese users.

[bpasero]

@octref feel free to merge when you feel like it.