clear search icon has been added

git-svn-id: https://plugins.svn.wordpress.org/wp-fastest-cache/trunk@1014762 b8457f37-d9ea-0310-8a92-e5e31aec5664
enter button works with search area

git-svn-id: https://plugins.svn.wordpress.org/wp-fastest-cache/trunk@1014764 b8457f37-d9ea-0310-8a92-e5e31aec5664