Add edit user page on client

[th3oth3rjak3]

This should be tabbed so main user details are on the first tab, then password change details are on the second tab. Since this will be an admin only page, it would be useful to have a password generator and an email template generator that allows the administrator to just paste the template into an email body and send it. This also needs a way for an administrator to lock the user's account. Locking the account means that the user is_disabled flag would be set to true and all user sessions would be revoked.