Fixed GAMESTATE:GetCurrentStage to use correct logic for determining if all human players are on final stage.

THEME:GetPath lua functions can now pass true for the third arg if the element is optional.
Fixes to various StageDisplay things in default.
thify_number and thified_curstage_index lua functions added to default/Scripts/04 Other.lua.

src/ScreenEvaluation.cpp

@@ -75,6 +75,17 @@ static const int NUM_SHOWN_RADAR_CATEGORIES = 5;
 AutoScreenMessage( SM_PlayCheer );
 
 REGISTER_SCREEN_CLASS( ScreenEvaluation );
+
+ScreenEvaluation::ScreenEvaluation()
+{
+	GAMESTATE->m_AdjustTokensBySongCostForFinalStageCheck= false;
+}
+
+ScreenEvaluation::~ScreenEvaluation()
+{
+	GAMESTATE->m_AdjustTokensBySongCostForFinalStageCheck= true;
+}
+
 void ScreenEvaluation::Init()
 {
 	LOG->Trace( "ScreenEvaluation::Init()" );