Move email field below password field to avoid confusing password managers

When setting up the site information, I am required to enter an administrative user name, an email address and a password in that order.

Firefox interprets this combination as meaning that my email is my username as it immediately precedes the password field, and the password manager will store my email address instead of my username.

To make it easier for password managers to understand the form, this ordering should be changed to place the email field below the password field.