🐛 Fixed ObjectDisposedException Errors on plant/field and InventorySlot

prefabs/farm/plants/base_plant.tscn

@@ -138,6 +138,7 @@ shape = SubResource("CircleShape2D_vjw4j")
 [node name="ReadyPlantInventoryItem" parent="." instance=ExtResource("6_gdrin")]
 position = Vector2(0, 2.3)
 IsActive = false
+_saveToDisk = false
 
 [node name="SpawnWithItem" parent="ReadyPlantInventoryItem" index="0"]
 _blueprint = ExtResource("7_vjw4j")

scripts/CSharp/Common/Animation/VesnaAnimations.cs

@@ -19,11 +19,16 @@ public partial class VesnaAnimations : Node
     /// </summary>
     [Signal] public delegate void LookDirectionEventHandler(Vector2 direction);
 
-    public override void _Ready()
+    public override void _EnterTree()
     {
 	    InventoryManager.Instance.playerInventory.InventoryContentsChanged += HandleNewItemInInventory;
     }
 
+    public override void _ExitTree()
+    {
+	    InventoryManager.Instance.playerInventory.InventoryContentsChanged -= HandleNewItemInInventory;
+    }
+
     private void HandleNewItemInInventory()
     {
 	    // for future Kathi: this does not, in fact, check if an item has been added only, but triggers on every content change!

scripts/CSharp/Common/Inventory/InventoryUi.cs

@@ -28,6 +28,7 @@ public partial class InventoryUi : Control
 
     public override void _ExitTree()
     {
+        InventoryManager.Instance.playerInventory.InventoryContentsChanged -= SetSlotContent;
         UnsubscribeSlots();
     }
 

scripts/CSharp/Common/Inventory/ItemOnGround2D.cs

@@ -11,6 +11,7 @@ public partial class ItemOnGround2D : Node, ISaveable
     [Export] public bool IsActive = true;
     [Export] private bool _infiniteSupply = false;
     [Export] private int _finiteSupply = 1;
+    [Export] private bool _saveToDisk = true;
 
     private int pickUpCounter = 0; 
     
@@ -96,6 +97,9 @@ public partial class ItemOnGround2D : Node, ISaveable
     // todo: What do we do with instances that are created at runtime?
     public void UpdateSaveData()
     {
+        if (!_saveToDisk)
+            return;
+        
         var payloadData = new Dictionary<string, Variant>
         {
             {"pickupCounter",  pickUpCounter}
@@ -107,6 +111,9 @@ public partial class ItemOnGround2D : Node, ISaveable
 
     public void LoadFromSaveData()
     {
+        if (!_saveToDisk)
+            return;
+        
         if (_infiniteSupply)
             return;