allow changing subfield index of any layer except hud

Author: menvae

fluXis/Screens/Edit/Tabs/Design/Points/Entries/LayerFadeEntry.cs

@@ -45,7 +45,7 @@ protected override Drawable[] CreateValueContent()
 
     protected override IEnumerable<Drawable> CreateSettings()
     {
-        var layerPlayfield = new BindableBool(fade.Layer == LayerFadeEvent.FadeLayer.Playfield);
+        var isNotHUD = new BindableBool(fade.Layer != LayerFadeEvent.FadeLayer.HUD);
 
         return base.CreateSettings().Concat(new Drawable[]
         {
@@ -73,7 +73,7 @@ protected override IEnumerable<Drawable> CreateSettings()
                 OnValueChanged = value =>
                 {
                     fade.Layer = value;
-                    layerPlayfield.Value = value == LayerFadeEvent.FadeLayer.Playfield;
+                    isNotHUD.Value = value != LayerFadeEvent.FadeLayer.HUD;
                     Map.Update(fade);
                 }
             },
@@ -85,7 +85,7 @@ protected override IEnumerable<Drawable> CreateSettings()
                 Min = 0,
                 Max = Map.MapInfo.IsDual ? 2 : 0,
                 Step = 1,
-                Enabled = layerPlayfield,
+                Enabled = isNotHUD,
                 HideWhenDisabled = true,
                 OnValueChanged = value =>
                 {
@@ -101,7 +101,7 @@ protected override IEnumerable<Drawable> CreateSettings()
                 Min = 0,
                 Max = Map.MapInfo.ExtraPlayfields + 1,
                 Step = 1,
-                Enabled = layerPlayfield,
+                Enabled = isNotHUD,
                 HideWhenDisabled = true,
                 OnValueChanged = value =>
                 {