Member validation email - suggestion

Hi, I did mention this a little while back, but it didn't make it into 2.1. But I really hope it can be sorted for future releases - particularly in these days of spambots and whatever else!

When using admin validation, you can get a mail sent by the system when someone joins, but it can't let you know when someone has validated their account. So if they don't do it straight away it's a lottery as to when you next login and admin validate them. Anyway of getting it to optionally send a mail when they validate as well?