added a list of page and page_id at setting

git-svn-id: https://plugins.svn.wordpress.org/zgboke-nav/trunk@1031038 b8457f37-d9ea-0310-8a92-e5e31aec5664
fix some info

git-svn-id: https://plugins.svn.wordpress.org/zgboke-nav/trunk@1031042 b8457f37-d9ea-0310-8a92-e5e31aec5664