Set model loaded even if there is an error so the UI is not loacked

lib/assets/javascripts/builder/components/modals/add-layer/content/imports/imports-selector/imports-selector-view.js

@@ -51,7 +51,7 @@ module.exports = CoreView.extend({
 
     var self = this;
     this.model.fetch({
-      success: function () {
+      complete: function () {
         self.model.set('loaded', true);
       }
     });
@@ -67,7 +67,7 @@ module.exports = CoreView.extend({
       userModel: this._userModel,
       configModel: this._configModel
     });
-    this.model.bind('sync', this._generateContent, this);
+    this.model.bind('change:loaded', this._generateContent, this);
   },
 
   _orderImports: function (importOptions) {