Append the modal inside the container and not the editor element

src/modal_dialog/index.js

@@ -52,9 +52,9 @@ module.exports = () => {
       return this;
     },
 
-    postRender(editorView) {
-      // c.em.config.el || 'body'
-      this.render().appendTo(editorView.el);
+    postRender(view) {
+      const el = view.model.getConfig().el || view.el;
+      this.render().appendTo(el);
     },
 
     /**

src/modal_dialog/view/ModalView.js

@@ -1,6 +1,6 @@
 module.exports = require('backbone').View.extend({
   template({ pfx, ppfx, content, title }) {
-    return `<div class="${pfx}dialog ${ppfx}one-bg">
+    return `<div class="${pfx}dialog ${ppfx}one-bg ${ppfx}two-color">
       <div class="${pfx}header">
         <div class="${pfx}title">${title}</div>
         <div class="${pfx}btn-close">&Cross;</div>