Escape title in HTML5 search form. props obenland, joostdevalk, scottsweb. fixes #25322.

git-svn-id: https://develop.svn.wordpress.org/trunk@25710 602fd350-edb4-49c9-b593-d223f7449a82
Remove tests for code still in development, see #22229. If accidentally run, they produce fatal errors.

props pauldewouters, no_fear_inc.


git-svn-id: https://develop.svn.wordpress.org/trunk@25711 602fd350-edb4-49c9-b593-d223f7449a82