Revert property unification for clarity

AetherBags/Addons/AddonInventoryWindow.cs

@@ -44,7 +44,7 @@ public class AddonInventoryWindow : NativeAddon
         {
             Position = ContentStartPosition,
             Size = ContentSize,
-            ItemSpacing = CategorySpacing,
+            HorizontalSpacing = CategorySpacing,
             VerticalSpacing = CategorySpacing,
             TopPadding = 4.0f,
             BottomPadding = 4.0f,

AetherBags/Nodes/WrappingGridNode.cs

@@ -9,6 +9,7 @@ namespace AetherBags.Nodes;
 
 public sealed class WrappingGridNode<T> : LayoutListNode where T : NodeBase
 {
+    public float HorizontalSpacing { get; set; } = 10f;
     public float VerticalSpacing { get; set; } = 10f;
 
     public float TopPadding { get; set; } = 0f;
@@ -50,7 +51,7 @@ public sealed class WrappingGridNode<T> : LayoutListNode where T : NodeBase
         _rowIndex.EnsureCapacity(count);
 
         float availableWidth = Width;
-        float hSpace = ItemSpacing;
+        float hSpace = HorizontalSpacing;
         float vSpace = VerticalSpacing;
         float startX = FirstItemSpacing;