Cosmetic cleanups

Added "press START for more options" to ScreenPlayerOptions

stepmania/src/MenuElements.cpp

@@ -136,6 +136,9 @@ void MenuElements::StartTransitioning( ScreenMessage smSendWhenDone )
 
 void MenuElements::Back( ScreenMessage smSendWhenDone )
 {
+	if( m_Back.IsTransitioning() )
+		return;	// ignore
+
 	m_MenuTimer.StopTimer();
 	m_Back.StartTransitioning( smSendWhenDone );
 	m_soundBack.Play();