Allow the value attribute for list items processed by kses.

props kraftbj.
fixes #24293.


git-svn-id: https://develop.svn.wordpress.org/trunk@25460 602fd350-edb4-49c9-b593-d223f7449a82
Check if the post type supports title. see #24423.

git-svn-id: https://develop.svn.wordpress.org/trunk@25461 602fd350-edb4-49c9-b593-d223f7449a82