Update springlobby.desktop

Let the RPM macro %suse_update_desktop_file add X-SuSE-translate if you want to distribute translation update packages. It is not required for everyone else.
Update springlobby.desktop

not a valid category http://standards.freedesktop.org/menu-spec/latest/apa.html
Merge pull request #122 from Mailaender/patch-1

Update springlobby.desktop