Admin: fix repositioning of notices when the first header is not an immediate children of `.wrap`.

Props DvanKooten for the initial patch.
Fixes #35047 for trunk.
Built from https://develop.svn.wordpress.org/trunk@36134


git-svn-id: https://core.svn.wordpress.org/trunk@36100 1a063a9b-81f0-0310-95a4-ce76da25c4cd