revert fb4f7ea2eb

Also update i18n

# Conflicts:
#	shadowsocks-csharp/Data/ja.txt
#	shadowsocks-csharp/Data/zh_CN.txt
#	shadowsocks-csharp/Data/zh_TW.txt

Support custom GFWListUrl defined in config file

Implement "Show Plugin Output" checkbox.

Use MD5 hash instead of timestamp for PAC URL

Hope it will resolve errors in CI.

Translate statistics config

change default method to chacha20-ietf-poly1305

Use id instead of calculating server.Identifier()

https://github.com/shadowsocks/shadowsocks-windows/issues/2657

Support Windows 10 1903 Light Theme

But Fix Support Windows 10 1903 Dark Theme

Init JS variable in more reliable and quick way, reduce redundant code

- Redirect the nuget \3rd folder to ..\packages folder as default by
  remove the nuget.config file
- Update csproj file: remove unnecessary scripts for old nuget
  packages on old .Net framework
- Upgrade nuget packages to .Net framework 4.7.2 as the target framework
- Downgrade Fody to 4.2.1. The 5.0.0+ requires MSBuild 16 and above

Microsoft Docs is misleading, as always. dotnet/samples#1644

Directly create a WebProxy with IPAddress.IPv6Loopback.ToString() throws UriFormatException. Format the proxy host name to satisfy WebProxy.

(cherry picked from commit 084b6fe72c)

[fixes #2542] Fix accidental index invalidation

Fixed an invalid index that was unexpectedly caused when the configuration was abandoned, resulting in an list box index exception.