After bulk deleting two files in Files and Uploads, two different files are selected

[magajh]

After bulk deleting two files in Files and Uploads, the next two files are automatically selected

Expected behavior

After selecting two files for bulk deletion and selecting the option to delete them, the files should no longer appear in the list of Files and Uploads and no files should be selected.

Actual behavior

Two different files are selected instead (probably using the same indexes as the originally selected ones).

Steps to reproduce

1. Upload a set of four or more files. Leave the default sorting behavior. I used the List view, but this happens in both.
2. Then select the first two files in the list and go to Actions -> Delete
3. After you press "Delete", those files will be removed, and the next two files will become selected.

Originally reported here: openedx/wg-build-test-release#425

[mariajgrimaldi]

FYI @arbrandes @bradenmacdonald @farhaanbukhsh