I think we need to add the new assets.js into the PIPELIE

cms/envs/common.py

@@ -228,7 +228,8 @@ PIPELINE_JS = {
         ) + ['js/hesitate.js', 'js/base.js',
              'js/models/feedback.js', 'js/views/feedback.js',
              'js/models/section.js', 'js/views/section.js',
-             'js/models/metadata_model.js', 'js/views/metadata_editor_view.js'],
+             'js/models/metadata_model.js', 'js/views/metadata_editor_view.js',
+             'js/views/assets.js'],
         'output_filename': 'js/cms-application.js',
         'test_order': 0
     },