removing icons

git-svn-id: https://plugins.svn.wordpress.org/mk-simple-backups/trunk@892991 b8457f37-d9ea-0310-8a92-e5e31aec5664
adding new icons

git-svn-id: https://plugins.svn.wordpress.org/mk-simple-backups/trunk@892992 b8457f37-d9ea-0310-8a92-e5e31aec5664