additional attribute added for the search box to identify its source (widget / shortcode)

git-svn-id: https://plugins.svn.wordpress.org/instantsearch-for-woocommerce/trunk@1038127 b8457f37-d9ea-0310-8a92-e5e31aec5664
added tab

git-svn-id: https://plugins.svn.wordpress.org/instantsearch-for-woocommerce/trunk@1038128 b8457f37-d9ea-0310-8a92-e5e31aec5664