Callback url with a custom url

https://github.com/aeternity/superhero-button/blob/4ca4b221c26518233e3b9517173c6b434d9d2100/src/superhero-button.js#L14-L16

If we are collecting tips on a separate URL, shouldn't web version of wallet redirect user to the current page instead of one that collects tips? Or maybe should be a separate option to specify the callback url?