HDFS-9877. HDFS Namenode UI: Fix browsing directories that need to be encoded (Ravi Prakash via aw)

(cherry picked from commit 15f018434c5b715729488fd0b03a11f1bc943470)

hadoop-hdfs-project/hadoop-hdfs/src/main/webapps/hdfs/explorer.js

@@ -33,7 +33,7 @@
   $(window).bind('hashchange', function () {
     $('#alert-panel').hide();
 
-    var dir = window.location.hash.slice(1);
+    var dir = decodeURIComponent(window.location.hash.slice(1));
     if(dir == "") {
       dir = "/";
     }