### Godot version

4.x

### System information

Windows 10

### Issue description

The `Search Result` panel is not correctly updated when changing the theme.

https://user-images.githubusercontent.com/66004280/208964493-d0423b78-3418-44c9-95ed-822fd34c4720.mp4



### Steps to reproduce

1. Search something
2. Change the theme

### Minimal reproduction project

--
_replace_line_edit->set_text(text);
}
void FindInFilesPanel::clear() {
	_file_items.clear();
	_result_items.clear();
	_results_display->clear();
	_results_display->create_item(); 
}
void FindInFilesPanel::start_search() {
	clear();
	_status_label->set_text(TTR("Searching..."));
	_search_text_label->set_text(_finder->get_search_text());
	set_process(true);
	set_progress_visible(true);
	_finder->start();
	update_replace_buttons();
	_refresh_button->hide();
	_cancel_button->show();
}
void FindInFilesPanel::stop_search() {