message: Fix up the audio volume reset on login into Lumina.
  It looks like the OS-specific functionality to save/restore the last audio setting is borked, so I bypassed it with a lumina-specific "session state" value in the user's settings file.
diff: @@ -188,7 +188,8 @@ void LSession::CleanupSession(){
  //Create a temporary flag to prevent crash dialogs from opening during cleanup
  LUtils::writeFile("/tmp/.luminastopping",QStringList() << "yes", true);
  //Start the logout chimes (if necessary)
  - LOS::setAudioVolume( LOS::audioVolume() ); //make sure the audio volume is saved in the backend for the next login
  + int vol = LOS::audioVolume();
  + if(vol>=0){ sessionsettings->setValue("last_session_state/audio_volume", vol); }
  bool playaudio = sessionsettings->value("PlayLogoutAudio",true).toBool();
  if( playaudio ){ playAudioFile(LOS::LuminaShare()+"Logout.ogg"); }
  //Stop the background system tray (detaching/closing apps as necessary)
  @@ -289,7 +290,7 @@ void LSession::launchStartupApps(){
  //Re-load the screen brightness and volume settings from the previous session
  // Wait until after the XDG-autostart functions, since the audio system might be started that way
  qDebug() << " - Loading previous settings";
  - tmp = LOS::audioVolume();
  + tmp = sessionsettings->value("last_session_state/audio_volume",50).toInt();
  if(tmp>=0){ LOS::setAudioVolume(tmp); }
  qDebug() << " - - Audio Volume:" << QString::number(tmp)+"%";
  