Fix a warning on Menus screen if $menu_locations is false.
Fix menu selection after creating a first menu on new install.

props jkudish.
fixes #23508. see #23119.

git-svn-id: http://core.svn.wordpress.org/trunk@23453 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Add a missing closing tag. fixes #23510. see #14358.

git-svn-id: http://core.svn.wordpress.org/trunk@23454 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Revert to esc_attr_e() in setup-config.php to prevent a fatal error.
kses.php is not loaded at this point, so esc_url() cannot be used.

props csixty4, JustinSainton.
fixes #23516. see #23334.

git-svn-id: http://core.svn.wordpress.org/trunk@23455 1a063a9b-81f0-0310-95a4-ce76da25c4cd