Add metrics for the skip display

stepmania/Themes/default/metrics.ini

@@ -1832,7 +1832,12 @@ Class="ScreenStatsOverlay"
 Fallback="Screen"
 StatsX=SCREEN_RIGHT-8
 StatsY=SCREEN_TOP+10
-StatsOnCommand=horizalign,right;vertalign,top;shadowlength,2
+StatsOnCommand=horizalign,right;vertalign,top;shadowlength,1
+
+SkipX=SCREEN_RIGHT-100
+SkipY=SCREEN_BOTTOM-100
+SkipWidth=190
+SkipSpacingY=14
 
 [MusicWheelItem]
 IconX=-136

stepmania/src/ScreenStatsOverlay.cpp

@@ -23,10 +23,10 @@ void ScreenStatsOverlay::Init()
 	 * the time in the log. */
 	m_LastSkip = 0;
 
-	const float SKIP_X = SCREEN_RIGHT - 100;
-	const float SKIP_Y = SCREEN_BOTTOM - 100;
-	const float SKIP_WIDTH = 190; 
-	const float SKIP_SPACING_Y = 14;
+	SKIP_X.Load( m_sName, "SkipX" );
+	SKIP_Y.Load( m_sName, "SkipY" );
+	SKIP_SPACING_Y.Load( m_sName, "SkipSpacingY" );
+	SKIP_WIDTH.Load( m_sName, "SkipWidth" );
 
 	RectF rectSkips = RectF(
 		SKIP_X-SKIP_WIDTH/2, 

stepmania/src/ScreenStatsOverlay.h

@@ -25,6 +25,11 @@ private:
 	BitmapText m_textSkips[NUM_SKIPS_TO_SHOW];
 	RageTimer m_timerSkip;
 	int m_LastSkip;
+
+	ThemeMetric<float> SKIP_X;
+	ThemeMetric<float> SKIP_Y;
+	ThemeMetric<float> SKIP_SPACING_Y;
+	ThemeMetric<float> SKIP_WIDTH;
 };