Add metric ResetGameState, this can be extremely useful in some places.

stepmania/Themes/default/metrics.ini

@@ -2088,6 +2088,7 @@ Fallback="StepsDisplayGameplay"
 [ScreenWithMenuElements]
 Fallback="Screen"
 AllowDisabledPlayerInput=false
+ResetGameState=false
 ShowStyleIcon=true
 ShowStageDisplay=false
 StageDisplayX=SCREEN_CENTER_X+234

stepmania/src/ScreenWithMenuElements.cpp

@@ -33,11 +33,14 @@ void ScreenWithMenuElements::Init()
 	CANCEL_TRANSITIONS_OUT.Load( m_sName, "CancelTransitionsOut" );
 	TIMER_SECONDS.Load( m_sName, "TimerSeconds" );
 	TIMER_METRICS_GROUP.Load( m_sName, "TimerMetricsGroup" );
-
+	RESET_GAMESTATE.Load( m_sName, "ResetGameState" );
 	Screen::Init();
 
 	ASSERT( this->m_SubActors.empty() );	// don't call Init twice!
 
+	if( RESET_GAMESTATE )
+		GAMESTATE->Reset();
+
 	if( MEMORY_CARD_ICONS )
 	{
 		FOREACH_PlayerNumber( p )

stepmania/src/ScreenWithMenuElements.h

@@ -58,6 +58,7 @@ protected:
 	ThemeMetric<bool>		CANCEL_TRANSITIONS_OUT;
 	ThemeMetric<float>		TIMER_SECONDS;
 	ThemeMetric<RString>		TIMER_METRICS_GROUP;
+	ThemeMetric<bool>		RESET_GAMESTATE;
 
 private:
 	RString				m_sPathToMusic;