Allow strings in component image upload function

src/dom_components/view/ComponentImageView.js

@@ -1,4 +1,4 @@
-var Backbone = require('backbone');
+import { isString } from 'underscore';
 var ComponentView = require('./ComponentView');
 
 module.exports = ComponentView.extend({
@@ -36,7 +36,7 @@ module.exports = ComponentView.extend({
         },
         res => {
           const obj = res && res.data && res.data[0];
-          const src = obj && obj.src;
+          const src = obj && (isString(obj) ? obj : obj.src);
           src && model.set({ src });
         }
       );