Spoilerize email addresses on individual adminops user profiles

[dfabulich]

In the dev environment, login as ifdbadmin@ifdb.org / secret and navigate to the adminops user profile for the admin account. http://localhost:8080/adminops?user=0000000000000000

Actual: You can see the user's email address in the clear.
Expected: Spoilerize it, so you have to click to see the email address, ensuring that it won't be revealed accidentally.

You can also reproduce this by creating a new user account, then logging in as ifdbadmin and going to http://localhost:8080/adminops?users&sortby=new to find the user account.