message: change startup wmclass
diff: @@ -3,10 +3,10 @@ Encoding=UTF-8
  Name=Gittyup
  Comment=Graphical Git client for Windows, Linux and macOS
  Exec=Gittyup
  -StartupWMClass=gittyup
  +StartupWMClass=com.github.Murmele.Gittyup
  Icon=gittyup
  Terminal=false
  Type=Application
  Categories=Development;
  X-Desktop-File-Install-Version=0.1
  -Name[de_DE]=com.github.Murmele.Gittyup.desktop
  +Name[de_DE]=Gittyup
  