Steps to reproduce

This has been reproduced on our demo instance following this steps:

1. Go to demo.magnolia-cms.com
2. Edit a page, f.e. /sportstation/about
3. Add a new component in main - Text and image
4. Go to image tab
5. Click "select new"
6. "Upload & edit" into any directory
7. Upload an image
8. Click the pencil "edit image"
9. The edit image dialog appears under the upload dialog, thus editing the image is not possible

Expected results

Edit dialog appears properly on top of the upload dialog

Actual results

Edit dialog appears under the upload dialog