Add `setDragMode` method to the component

src/dom_components/model/Component.js

@@ -229,6 +229,16 @@ const Component = Backbone.Model.extend(Styleable).extend(
       return collection && collection.indexOf(this);
     },
 
+    /**
+     * Change the drag mode of the component.
+     * To get more about this feature read: https://github.com/artf/grapesjs/issues/1936
+     * @param {String} value Drag mode, options: 'absolute' | 'translate'
+     * @returns {this}
+     */
+    setDragMode(value) {
+      return this.set('dmode', value);
+    },
+
     /**
      * Find inner components by query string.
      * **ATTENTION**: this method works only with already rendered component