Uploading multiple files with the same name will show the same thumbnail in upload tab

[oanalavinia]

Steps to reproduce:

1. Create a folder and go to New file tab
2. Upload a image file (for example with name picture.png)
3. Upload 2 image files with the same name, but different case (for example Picture.png and picTure.png)
4. Select 'replace' action in 'Similar file exist' warning pop-up

Expected result:
For each upload the thumbnail of the image is specific to the uploaded image (as the size of the file is)

Actual result:
The thumbnails of the uploaded images are all of the last uploaded image

[mflorea]

Maybe we need to force the attachment version in the URL.