Fix folder renaming. (fixes #196)

Author: donmccurdy

src/dat/gui/GUI.js

@@ -177,6 +177,7 @@ const GUI = function(pars) {
     localStorage.getItem(getLocalStorageHash(this, 'isLocal')) === 'true';
 
   let saveToLocalStorage;
+  let titleRow;
 
   Object.defineProperties(this,
     /** @lends GUI.prototype */
@@ -267,8 +268,8 @@ const GUI = function(pars) {
         set: function(v) {
           // TODO Check for collisions among sibling folders
           params.name = v;
-          if (titleRowName) {
-            titleRowName.innerHTML = params.name;
+          if (titleRow) {
+            titleRow.innerHTML = params.name;
           }
         }
       },
@@ -376,7 +377,7 @@ const GUI = function(pars) {
     const titleRowName = document.createTextNode(params.name);
     dom.addClass(titleRowName, 'controller-name');
 
-    const titleRow = addRow(_this, titleRowName);
+    titleRow = addRow(_this, titleRowName);
 
     const onClickTitle = function(e) {
       e.preventDefault();