Fix radio input styles

package.json

@@ -1,7 +1,7 @@
 {
   "name": "grapesjs",
   "description": "Free and Open Source Web Builder Framework",
-  "version": "0.12.17",
+  "version": "0.12.19",
   "author": "Artur Arseniev",
   "license": "BSD-3-Clause",
   "homepage": "http://grapesjs.com",

src/style_manager/view/PropertyRadioView.js

@@ -5,7 +5,6 @@ module.exports = require('./PropertyView').extend({
     const ppfx = this.ppfx;
     return `
       <div class="${ppfx}field ${ppfx}field-radio">
-        <span id="${pfx}input-holder"></span>
       </div>
     `;
   },
@@ -35,7 +34,7 @@ module.exports = require('./PropertyView').extend({
           `;
         });
 
-        const inputHld = this.el.querySelector(`#${pfx}input-holder`);
+        const inputHld = this.el.querySelector(`.${ppfx}field`);
         inputHld.innerHTML = `<div class="${ppfx}radio-items">${inputStr}</div>`;
         this.input = inputHld.firstChild;
       }

src/style_manager/view/PropertyView.js

@@ -152,7 +152,7 @@ module.exports = Backbone.View.extend({
    * the value of the model which will propogate those changes to the target
    */
   inputValueChanged(e) {
-    e.stopPropagation();
+    e && e.stopPropagation();
     this.model.set('value', this.getInputValue());
     this.elementUpdated();
   },

test/specs/style_manager/view/PropertyRadioView.js

@@ -67,12 +67,12 @@ module.exports = {
         });
 
         it('Options rendered', () => {
-          var input = view.el.querySelector('#input-holder').firstChild;
+          var input = view.el.querySelector('.field').firstChild;
           expect(input.children.length).toEqual(options.length);
         });
 
         it('Options rendered correctly', () => {
-          var children = view.el.querySelector('#input-holder').firstChild.children;
+          var children = view.el.querySelector('.field').firstChild.children;
           expect(children[0].querySelector('label').textContent).toEqual('test1value');
           expect(children[1].querySelector('label').textContent).toEqual('test2');
           expect(children[0].querySelector('input').value).toEqual(options[0].value);