Admin-bar.css refresh, add back IE compat. "return false" so clicking on the...

Admin-bar.css refresh, add back IE compat. "return false" so clicking on the search box doesn't scropp the page to the top, props ocean90, fixes #19153, fixes #19151

git-svn-id: https://core.svn.wordpress.org/trunk@19160 1a063a9b-81f0-0310-95a4-ce76da25c4cd