Display email address along side name for Assets

When adding an asset it would be helpful to display the email next to the user's name when attaching an asset to a user.

The reason for this is we have a customer who changed their email domain and most user's simply create a new account rather than logging in to their previous account. This means that we have to manually go in and attach their image asset to the new account.

When modifying the asset, we have identical names to choose from. It would make it easier to choose the correct user if we could see the email address next to the user's name.

As a side note, this wouldn't really be an issue if we could do a mass update of user accounts. Since the accounts are currently tied to the email address and not the GUID, we are unable to do so.