[GameCommand] Remove pushscreen

[ScreenOptionsMasterPrefs] Reset Judge and Life values to the ones in SM4
[ScreenNetEvaluation] add Score, Grade, PlayerOptions params to UpdateNetEvalStats message
[PlayerState] add GetHealthState Lua binding
small cleanup in statsman

src/GameCommand.h

@@ -80,7 +80,6 @@ public:
 	RString		m_sUrl;
 	// sm-ssc adds:
 	bool		m_bUrlExits;	// for making stepmania not exit on url
-	bool		m_bPushScreen;	// for pushing a screen on top instead of as next
 
 	bool m_bInsertCredit;
 	bool m_bClearCredits;