### 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
undo_redo->add_undo_method(node, "set_position", Object::cast_to<Control>(node)->get_position());
			}
		}
	}
	perform_node_renames(nullptr, &path_renames);
	undo_redo->commit_action();
}
void SceneTreeDock::_script_created(Ref<Script> p_script) {
	List<Node *> selected = editor_selection->get_selected_node_list();
	if (selected.is_empty()) {
		return;
	}
	EditorUndoRedoManager *undo_redo = EditorUndoRedoManager::get_singleton();
	undo_redo->create_action(TTR("Attach Script"), UndoRedo::MERGE_DISABLE, selected.front()->get());
	for (Node *E : selected) {
		Ref<Script> existing = E->get_script();
		undo_redo->add_do_method(InspectorDock::get_singleton(), "store_script_properties", E);
		undo_redo->add_undo_method(InspectorDock::get_singleton(), "store_script_properties", E);
		undo_redo->add_do_method(E, "set_script", p_script);
		undo_redo->add_undo_method(E, "set_script", existing);
		undo_redo->add_do_method(InspectorDock::get_singleton(), "apply_script_properties", E);
		undo_redo->add_undo_method(InspectorDock::get_singleton(), "apply_script_properties", E);
		undo_redo->add_do_method(this, "_update_script_button");
		undo_redo->add_undo_method(this, "_update_script_button");
	}
	undo_redo->commit_action();
	_push_item(p_script.ptr());
	_update_script_button();
}
void SceneTreeDock::_shader_created(Ref<Shader> p_shader) {