use SCREEN_* constants in EditMenu positions

stepmania/Themes/default/metrics.ini

@@ -2149,39 +2149,39 @@ TextZoom=0.8
 NextScreen=ScreenRanking
 
 [EditMenu]
-Arrows1X=190
+Arrows1X=SCREEN_CENTER_X-130
-Arrows2X=590
+Arrows2X=SCREEN_CENTER_X+270
-SongBannerX=490
+SongBannerX=SCREEN_CENTER_X+170
-SongBannerY=130
+SongBannerY=SCREEN_CENTER_Y-110
 SongBannerWidth=130
 SongBannerHeight=40
-SongTextBannerX=320
+SongTextBannerX=SCREEN_CENTER_X
-SongTextBannerY=130
+SongTextBannerY=SCREEN_CENTER_Y-110
-GroupBannerX=490
+GroupBannerX=SCREEN_CENTER_X+170
 GroupBannerY=80
 GroupBannerWidth=130
 GroupBannerHeight=40
-MeterX=490
+MeterX=SCREEN_CENTER_X+170
-MeterY=220
+MeterY=SCREEN_CENTER_Y-20
-SourceMeterX=490
+SourceMeterX=SCREEN_CENTER_X+170
-SourceMeterY=300
+SourceMeterY=SCREEN_CENTER_Y+60
-RowLabelsX=40
+RowLabelsX=SCREEN_LEFT+40
 RowLabelOnCommand=zoom,0.7
-RowValue1X=320
+RowValue1X=SCREEN_CENTER_X
-RowValue2X=380
+RowValue2X=SCREEN_CENTER_X+60
-RowValue3X=380
+RowValue3X=SCREEN_CENTER_X+60
-RowValue4X=320
+RowValue4X=SCREEN_CENTER_X
-RowValue5X=380
+RowValue5X=SCREEN_CENTER_X+60
-RowValue6X=320
+RowValue6X=SCREEN_CENTER_X
-RowValue7X=380
+RowValue7X=SCREEN_CENTER_X+60
 RowValueOnCommand=zoom,0.7
-Row1Y=80
+Row1Y=SCREEN_CENTER_Y-160
-Row2Y=130
+Row2Y=SCREEN_CENTER_Y-110
-Row3Y=180
+Row3Y=SCREEN_CENTER_Y-60
-Row4Y=220
+Row4Y=SCREEN_CENTER_Y-20
-Row5Y=260
+Row5Y=SCREEN_CENTER_Y+20
-Row6Y=300
+Row6Y=SCREEN_CENTER_Y+60
-Row7Y=340
+Row7Y=SCREEN_CENTER_Y+100
 
 [ScreenEditMenu]
 Fallback=ScreenWithMenuElements