Create User dialog no longer automatically suggests username based on first and last names

> The new version has moved the First Name and Last Name boxes to the bottom of the dialog and you have to manually type in a username at the top, which really slows down the process.

We didn't remove the autofill feature. If you fill the first Name and Last Name boxes, the userName will be autofilled as soon as you focus it again. The order has been changed so it's less intuitive to get it to work, but it's still here.