- Workaround for ElementHost bug

- Infrastructure: use one HttpClient instance throughout the lifecycle
- Version update: rewrite the update service and add update prompt window
- Server sharing: add copy link button
- Dependencies: add ReactiveUI.Events.WPF, ReactiveUI.Fody, ReactiveUI.Validation, WPFLocalizeExtension, MdXaml

- Validate geosite group configuration
- Reset to default if specified group doesn't exist
- Regenerate pac.txt on version update (can be turned off)
- Cleanup of `Configuration` to separate loading logic and processing logic

# Conflicts:
#	shadowsocks-csharp/Controller/Service/UpdateChecker.cs
#	shadowsocks-csharp/Controller/System/ProtocolHandler.cs
#	shadowsocks-csharp/Program.cs
#	shadowsocks-csharp/packages.config
#	shadowsocks-csharp/shadowsocks-csharp.csproj

- Removed some legacy compatibility code from Program.cs as we are not using .NET Framework.
- Changed CurrentDirectory detection method so that Self-Contained .exe can have its configuration files in the same directory as the .exe instead of in the temporary folder.

in case gfwlist no longer update

We forget merge it

also with some i18n update

Use singleton mode for hotkey callbacks.

I hope this is the last one.

Signed-off-by: Syrone Wong <wong.syrone@gmail.com>

- detach event handler before exiting
- eliminate UI and non-UI exception handling race
- rework exception message

Signed-off-by: Syrone Wong <wong.syrone@gmail.com>

- enlarge timeout to 10 seconds
- detach event handler before exiting
- output log if success

Signed-off-by: Syrone Wong <wong.syrone@gmail.com>

Signed-off-by: Syrone Wong <wong.syrone@gmail.com>

Signed-off-by: Syrone Wong <wong.syrone@gmail.com>

Signed-off-by: Syrone Wong <wong.syrone@gmail.com>

Signed-off-by: Syrone Wong <wong.syrone@gmail.com>

Workaround for slow computers

Credit to GangZhou's code

Signed-off-by: Syrone Wong <wong.syrone@gmail.com>