add screenshot description

git-svn-id: https://plugins.svn.wordpress.org/disable-title/trunk@815321 b8457f37-d9ea-0310-8a92-e5e31aec5664
typo

git-svn-id: https://plugins.svn.wordpress.org/disable-title/trunk@815323 b8457f37-d9ea-0310-8a92-e5e31aec5664