Abort pending directory search before executing a new one

www/js/search.js

@@ -106,6 +106,9 @@
 					self = this;
 				
 				this._searchCanceled = false;
+				if (this._xhr) {
+					this._xhr.abort();
+				}
 				
 				if (cacheData) {
 					this._render(cacheData);