TinyMCE: fix the cursor appearance while it is outside the editor body. Props miyauchi, fixes #30112.

git-svn-id: https://develop.svn.wordpress.org/trunk@30349 602fd350-edb4-49c9-b593-d223f7449a82
Editor: enable spellchecking of the post title field on the Edit Post screen. Props marsjaninzmarsa, fixes #30338.

git-svn-id: https://develop.svn.wordpress.org/trunk@30350 602fd350-edb4-49c9-b593-d223f7449a82