fixed bad icomoon json

git-svn-id: https://plugins.svn.wordpress.org/loco-translate/trunk@765146 b8457f37-d9ea-0310-8a92-e5e31aec5664
changed download icon

git-svn-id: https://plugins.svn.wordpress.org/loco-translate/trunk@765147 b8457f37-d9ea-0310-8a92-e5e31aec5664