### Godot version

4.1 rc3

### System information

Windows 10.0.19045 - Vulkan (Forward+) - dedicated NVIDIA GeForce GTX 1060 (NVIDIA; 30.0.15.1403) - Intel(R) Core(TM) i7-7700HQ CPU @ 2.80GHz (8 Threads)

### Issue description

This™
![image](https://github.com/godotengine/godot/assets/2223172/cb33110f-a5b0-400a-951f-3fa425f05714)

It can still happen, but it's more difficult to trigger.

### Steps to reproduce

1. Create a new scene with a Control node
2. Add Theme to the Control
3. Open Theme Editor
4. Clear the `theme` property in Control
5. Save, with Theme Editor opened
6. Restart

### Minimal reproduction project

N/A
}
		for (EditorPlugin *plugin : item_plugins) {
			if (active_plugins[owner_id].has(plugin)) {
				plugin->edit(p_object);
				continue;
			}
			for (KeyValue<ObjectID, HashSet<EditorPlugin *>> &kv : active_plugins) {
				if (kv.key != owner_id) {
					EditorPropertyResource *epres = Object::cast_to<EditorPropertyResource>(ObjectDB::get_instance(kv.key));
					if (epres && kv.value.has(plugin)) {
						
						epres->fold_resource();
					}
					kv.value.erase(plugin);
				}
			}
			active_plugins[owner_id].insert(plugin);
			_plugin_over_edit(plugin, p_object);
		}
	} else {
		hide_unused_editors(p_editing_owner);
	}
}
void EditorNode::push_node_item(Node *p_node) {
	if (p_node || Object::cast_to<Node>(InspectorDock::get_inspector_singleton()->get_edited_object()) || Object::cast_to<MultiNodeEdit>(InspectorDock::get_inspector_singleton()->get_edited_object())) {
		
		push_item(p_node);
	}
}
void EditorNode::push_item(Object *p_object, const String &p_property, bool p_inspector_only) {