Improve a11y search

See https://github.com/unl/wdntemplates/pull/886

www/js/search.js

@@ -363,7 +363,7 @@
 				
 				if (window.parent != undefined) {
 					$(document).on('keydown', function(e) {
-						if (!e.keyCode || e.keyCode === 27) {
+						if (e.keyCode === 27) {
 							window.parent.postMessage('wdn.search.close', "*");
 						}
 					});