Fix ck-editor will unmount exception

Author: Dmitry Kuzin (DevExpress)

src/ck-editor.js

@@ -3,24 +3,24 @@ function init(Survey) {
     name: "editor",
     title: "Editor",
     iconName: "icon-editor",
-    widgetIsLoaded: function() {
+    widgetIsLoaded: function () {
       return typeof CKEDITOR != "undefined";
     },
-    isFit: function(question) {
+    isFit: function (question) {
       return question.getType() === "editor";
     },
     htmlTemplate:
       "<textarea rows='10' cols='80' style: {width:'100%'}></textarea>",
-    activatedByChanged: function(activatedBy) {
+    activatedByChanged: function (activatedBy) {
       Survey.JsonObject.metaData.addClass("editor", [], null, "empty");
       Survey.JsonObject.metaData.addProperty("editor", {
         name: "height",
         default: 300
       });
     },
-    afterRender: function(question, el) {
+    afterRender: function (question, el) {
       var name = question.name;
-      CKEDITOR.editorConfig = function(config) {
+      CKEDITOR.editorConfig = function (config) {
         config.language = "es";
         config.height = question.height;
         config.toolbarCanCollapse = true;
@@ -36,18 +36,18 @@ function init(Survey) {
       CKEDITOR.instances[name].config.readOnly = question.isReadOnly;
 
       var isValueChanging = false;
-      var updateValueHandler = function() {
+      var updateValueHandler = function () {
         if (isValueChanging || typeof question.value === "undefined") return;
         editor.setData(question.value);
       };
-      editor.on("change", function() {
+      editor.on("change", function () {
         isValueChanging = true;
         question.value = editor.getData();
         isValueChanging = false;
       });
 
       question.valueChangedCallback = updateValueHandler;
-      question.readOnlyChangedCallback = function() {
+      question.readOnlyChangedCallback = function () {
         if (question.isReadOnly) {
           editor.setReadOnly(true);
         } else {
@@ -58,7 +58,7 @@ function init(Survey) {
     },
     willUnmount: function (question, el) {
       question.readOnlyChangedCallback = null;
-      CKEDITOR.instances[question.id].destroy(false);
+      CKEDITOR.instances[question.name].destroy(false);
     }
   };