Fix nodes not disabed when deleted due to undo/redo

Author: alelievr

Assets/com.alelievr.NodeGraphProcessor/Editor/NodeInspectorObject.cs

@@ -87,5 +87,11 @@ public virtual void UpdateSelectedNodes(HashSet<BaseNodeView> views)
             selectedNodes = views;
             nodeSelectionUpdated?.Invoke();
         }
+
+        public virtual void NodeViewRemoved(BaseNodeView view)
+        {
+            selectedNodes.Remove(view);
+            nodeSelectionUpdated?.Invoke();
+        }
     }
 }

Assets/com.alelievr.NodeGraphProcessor/Runtime/Graph/BaseGraph.cs

@@ -419,6 +419,13 @@ public void OnBeforeSerialize()
 		// so we can load objects references
 		public void Deserialize()
 		{
+			// Disable nodes correctly before removing them:
+			if (nodes != null)
+			{
+				foreach (var node in nodes)
+					node.DisableInternal();
+			}
+
 			nodes.Clear();
 
 			foreach (var serializedNode in serializedNodes.ToList())