use SCREEN_* constants in EditMenu positions

stepmania/Themes/default/metrics.ini

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