onImageDelete.diff

$ git diff
diff --git a/static/js/utils/new_edit_mode_helpers.js b/static/js/utils/new_edit_mode_helpers.js
index 0493e82..ef024e8 100644
--- a/static/js/utils/new_edit_mode_helpers.js
+++ b/static/js/utils/new_edit_mode_helpers.js
@@ -63,6 +63,7 @@ define(function (require) {
                         '450x450': '',
                         '980x': '',
                         'image_caption': '',
+                        'image_external': '',
                         'image_id': 0,
                         'image_size': []
                     }, resetSizes);