trunk/5.14 - Added option for custom tab size

git-svn-id: https://plugins.svn.wordpress.org/wp-flybox/trunk@973364 b8457f37-d9ea-0310-8a92-e5e31aec5664
5.14 trunk supplement - description change (not blank) on h and w

git-svn-id: https://plugins.svn.wordpress.org/wp-flybox/trunk@973368 b8457f37-d9ea-0310-8a92-e5e31aec5664