Update user properties individually

[LeeBuckland]

Please make it possible to change the name, email address, or password individually, rather than having to update multiple items simultaneously. In testing, I went to change the username, only to be prompted I needed to add a password.

[dkorecko]

The only reason why it was made this way was to add admin accounts. But yes, it's not a great user experience and I'll look into splitting those up.