Fix cloning of attribute in `clone` method

dist/grapes.js

@@ -4627,7 +4627,8 @@ module.exports = Backbone.Model.extend(_Styleable2.default).extend({
   clone: function clone(reset) {
     var em = this.em;
     var style = this.getStyle();
-    var attr = (0, _underscore.clone)(this.attributes);
+    var attr = _extends({}, this.attributes);
+    attr.attributes = _extends({}, attr.attributes);
     delete attr.attributes.id;
     attr.components = [];
     attr.classes = [];
@@ -23211,7 +23212,7 @@ module.exports = function () {
     plugins: plugins,
 
     // Will be replaced on build
-    version: '0.12.55',
+    version: '0.12.56',
 
     /**
      * Initializes an editor based on passed options
@@ -35878,7 +35879,7 @@ module.exports = function () {
       if (customRte) {
         customRte.disable(el, rte);
       } else {
-        rte.disable();
+        rte && rte.disable();
       }
 
       hideToolbar();

package-lock.json

@@ -1,6 +1,6 @@
 {
   "name": "grapesjs",
-  "version": "0.12.55",
+  "version": "0.12.56",
   "lockfileVersion": 1,
   "requires": true,
   "dependencies": {

package.json

@@ -1,7 +1,7 @@
 {
   "name": "grapesjs",
   "description": "Free and Open Source Web Builder Framework",
-  "version": "0.12.55",
+  "version": "0.12.56",
   "author": "Artur Arseniev",
   "license": "BSD-3-Clause",
   "homepage": "http://grapesjs.com",

src/dom_components/model/Component.js

@@ -562,7 +562,8 @@ module.exports = Backbone.Model.extend(Styleable).extend({
   clone(reset) {
     const em = this.em;
     const style = this.getStyle();
-    const attr = clone(this.attributes);
+    const attr = { ...this.attributes };
+    attr.attributes = { ...attr.attributes };
     delete attr.attributes.id;
     attr.components = [];
     attr.classes = [];