Add `undo` and `redo` events

src/editor/index.js

@@ -51,6 +51,8 @@
  * * `stop:{commandName}` - Triggered when some command is called to stop (eg. editor.stopCommand('preview'))
  * ## General
  * * `canvasScroll` - Triggered when the canvas is scrolle
+ * * `undo` - Undo executed
+ * * `redo` - Redo executed
  * * `load` - When the editor is loaded
  *
  * @param {Object} config Configurations

src/undo_manager/index.js

@@ -61,6 +61,7 @@ module.exports = () => {
       const events = ['style', 'attributes', 'content', 'src'];
       events.forEach(ev => um.addUndoType(`change:${ev}`, customUndoType));
       um.on('undo redo', () => em.trigger('change:selectedComponent change:canvasOffset'));
+      ['undo', 'redo'].forEach(ev => um.on(ev, () => em.trigger(ev)));
 
       return this;
     },