Image size is not passed to image-uploader when inserting an image from new media gallery

[sivaschenko]

Preconditions (*)

Install magneto and adobe stock integration

Steps to reproduce (*)

1. Login to Admin panel
2. Go to Catalog -> Category
3. Select any category
4. Expand Content fieldset
5. Click "Select from Gallery" button next to "Category Image" field
6. Select any image in the media gallery and click "Add Selected" button

Actual result (*)

The image is inserted and "NaN undefined" is displayed in the image uploader instead of image size

Expected result (*)

The image is inserted and the correct image size is displayed in the image uploader