Fix some dispose issues

AetherBags/Addons/AddonCategoryConfigurationWindow.cs

@@ -154,11 +154,10 @@ public class AddonCategoryConfigurationWindow : NativeAddon
 
     protected override unsafe void OnFinalize(AtkUnitBase* addon)
     {
-        _selectionListNode?.Dispose();
         _selectionListNode = null;
-
-        _configNode?.Dispose();
         _configNode = null;
+        _separatorLine = null;
+        _nothingSelectedTextNode = null;
         base.OnFinalize(addon);
     }
 }

AetherBags/Nodes/Configuration/Category/CategoryScrollingAreaNode.cs

@@ -7,7 +7,6 @@ namespace AetherBags.Nodes.Configuration.Category;
 public sealed class CategoryScrollingAreaNode : ScrollingListNode
 {
     private AddonCategoryConfigurationWindow? _categoryConfigurationAddon;
-    private readonly TextButtonNode _categoryConfigurationButtonNode;
 
     public CategoryScrollingAreaNode()
     {
@@ -15,13 +14,13 @@ public sealed class CategoryScrollingAreaNode : ScrollingListNode
 
         AddNode(new CategoryGeneralConfigurationNode());
 
-        _categoryConfigurationButtonNode = new TextButtonNode
+        var categoryConfigurationButtonNode = new TextButtonNode
         {
             Size = new Vector2(300, 28),
             String = "Configure Categories",
             OnClick = () => _categoryConfigurationAddon?.Toggle(),
         };
-        AddNode(_categoryConfigurationButtonNode);
+        AddNode(categoryConfigurationButtonNode);
     }
 
     private void InitializeCategoryAddon() {
@@ -33,4 +32,18 @@ public sealed class CategoryScrollingAreaNode : ScrollingListNode
             Title = "Category Configuration Window",
         };
     }
+
+    protected override void Dispose(bool disposing, bool isNativeDestructor)
+    {
+        if (disposing)
+        {
+            if (_categoryConfigurationAddon != null)
+            {
+                _categoryConfigurationAddon.Close();
+                _categoryConfigurationAddon = null;
+            }
+        }
+
+        base.Dispose(disposing, isNativeDestructor);
+    }
 }