Eliminate use of `extract()` in `wp_insert_user()`.

See #22400.


git-svn-id: https://develop.svn.wordpress.org/trunk@28454 602fd350-edb4-49c9-b593-d223f7449a82
DFW: fix closing only the wpLink or media modal when pressing Esc.

git-svn-id: https://develop.svn.wordpress.org/trunk@28455 602fd350-edb4-49c9-b593-d223f7449a82