message: Switch the icon used for the cancel button in the logout dialog.
  Make it use "system-cancel" before it looks for "dialog-cancel"
diff: @@ -20,7 +20,7 @@ SystemWindow::SystemWindow() : QDialog(), ui(new Ui::SystemWindow){
  ui->tool_restart->setIcon( LXDG::findIcon("system-reboot","") );
  ui->tool_shutdown->setIcon( LXDG::findIcon("system-shutdown","") );
  ui->tool_suspend->setIcon( LXDG::findIcon("system-suspend","") );
  - ui->push_cancel->setIcon( LXDG::findIcon("dialog-cancel","") );
  + ui->push_cancel->setIcon( LXDG::findIcon("system-cancel","dialog-cancel") );
  ui->push_lock->setIcon( LXDG::findIcon("system-lock-screen","") );
  //Connect the signals/slots
  connect(ui->tool_logout, SIGNAL(clicked()), this, SLOT(sysLogout()) );
  