clash for windows v 0.19.15

• downgrade Electron
• fix dashboard could not open issue (Windows)
• improve logic of Specify Protocol(#2855) (Windows)
• fix mini list performance issue
• fix some other glitches

Download:

• Clash.for.Windows-0.19.15-arm64-mac.7z
• Clash.for.Windows-0.19.15-arm64-win.7z
• Clash.for.Windows-0.19.15-arm64.dmg
• Clash.for.Windows-0.19.15-ia32-win.7z
• Clash.for.Windows-0.19.15-mac.7z
• Clash.for.Windows-0.19.15-win.7z
• Clash.for.Windows-0.19.15-x64-linux.tar.gz
• Clash.for.Windows-0.19.15.dmg
• Clash.for.Windows.Setup.0.19.15.arm64.exe
• Clash.for.Windows.Setup.0.19.15.exe
• Clash.for.Windows.Setup.0.19.15.ia32.exe