fixed renaming a root node in the scene editor.

Author: JavaSaBr

src/main/java/com/ss/editor/ui/control/model/tree/action/operation/RenameNodeOperation.java

@@ -53,15 +53,15 @@ public RenameNodeOperation(@NotNull final String oldName, @NotNull final String
     protected void redoImpl(@NotNull final ModelChangeConsumer editor) {
         EXECUTOR_MANAGER.addJMETask(() -> {
             spatial.setName(newName);
-            EXECUTOR_MANAGER.addFXTask(() -> editor.notifyFXChangeProperty(spatial.getParent(), spatial, PROPERTY_NAME));
+            EXECUTOR_MANAGER.addFXTask(() -> editor.notifyFXChangeProperty(spatial, PROPERTY_NAME));
         });
     }
 
     @Override
     protected void undoImpl(@NotNull final ModelChangeConsumer editor) {
         EXECUTOR_MANAGER.addJMETask(() -> {
             spatial.setName(oldName);
-            EXECUTOR_MANAGER.addFXTask(() -> editor.notifyFXChangeProperty(spatial.getParent(), spatial, PROPERTY_NAME));
+            EXECUTOR_MANAGER.addFXTask(() -> editor.notifyFXChangeProperty(spatial, PROPERTY_NAME));
         });
     }
 }

src/main/java/com/ss/editor/ui/control/tree/NodeTreeCell.java

@@ -58,8 +58,8 @@ public class NodeTreeCell<C extends ChangeConsumer, M extends NodeTree<C>> exten
     private final StringConverter<TreeNode<?>> stringConverter = new StringConverter<TreeNode<?>>() {
 
         @Override
-        public String toString(@NotNull final TreeNode<?> object) {
-            return object.getName();
+        public String toString(@Nullable final TreeNode<?> object) {
+            return object == null ? "" : object.getName();
         }
 
         @Override