re-arranged extra PNG compression option

git-svn-id: https://plugins.svn.wordpress.org/ewww-image-optimizer/trunk@1006900 b8457f37-d9ea-0310-8a92-e5e31aec5664
updated template for translators

git-svn-id: https://plugins.svn.wordpress.org/ewww-image-optimizer/trunk@1006903 b8457f37-d9ea-0310-8a92-e5e31aec5664