### Godot version

v4.1.1.stable.official [bd6af8e0e]

### System information

Godot v4.1.1.stable - Debian GNU/Linux trixie/sid trixie - Vulkan (Compatibility) - Mesa Intel(R) HD Graphics 520 (SKL GT2) () - Intel(R) Core(TM) i7-6500U CPU @ 2.50GHz (4 Threads)

### Issue description

After right clicking in thet "Filter Nodes" menu in the scene tree dock, the sub-menu is populated with a "Search" icon.

If I later switch themes in the same session, this icon is never updated to match the new theme.

![image](https://github.com/godotengine/godot/assets/660911/14336bb3-12ca-48c8-b030-8ada6ac27ec6)


### Steps to reproduce

1. Right click in the "Filter Nodes" menu in scene tree dock
2. Switch themes
3. Right click again in the "Filter Nodes" menu

Expected result: Icon has updated to match the theme I am currently using
Actual result: Icon is still using the theme I launched Godot with

### Minimal reproduction project

N/A
}
		if (E.hint != PROPERTY_HINT_RESOURCE_TYPE) {
			continue;
		}
		Variant value = p_node->get(E.name);
		if (value.get_type() != Variant::OBJECT) {
			continue;
		}
		Ref<Resource> res = value;
		if (res.is_null()) {
			continue;
		}
		if (!res->is_built_in() || res->get_path().get_slice("::", 0) != edited_scene->get_scene_file_path()) {
			
			continue;
		}
		const Pair<Ref<Resource>, Node *> pair(res, p_node);
		r_resources.push_back(pair);
	}
	for (int i = 0; i < p_node->get_child_count(); i++) {
		_gather_resources(p_node->get_child(i), r_resources);
	}
}
void SceneTreeDock::_edit_subresource(int p_idx, const PopupMenu *p_from_menu) {
	const ObjectID &id = p_from_menu->get_item_metadata(p_idx);
	Object *obj = ObjectDB::get_instance(id);
	ERR_FAIL_COND(!obj);
	_push_item(obj);
}
void SceneTreeDock::_bind_methods() {