Media Folder is not Recursive to Sub Folders

[surjithctly]

Describe the bug
media_folder: "static/img" is only looking for the root folder. Not subfolders.
To Reproduce

1. Create subfolders inside media folder
2. Check admin / Media Tab
3. Cannot see images inside subfolders

Expected behavior

All images inside the selected path should show.

Example:

/static/img/
/static/img/screens
/static/img/visuals
/static/img/icons

Applicable Versions:
Windows, Github, Eleventy, Json data

CMS configuration

backend:
  name: github
  repo: username/repo
media_folder: "static/img"

[erezrokah]

Thanks @surjithctly closing this in favour of #3240