Reload should update the expandable status of previously empty folders

Before this MR, reloading the view would not update the expandable status of folders which recently become non-empty.

Steps to reproduce -

1. Create an empty folder
2. create an empty new file as a sibling (not child) of this new empty folder
3. move the new file into the above empty folder
4. reload the view

Ideally after the 4th step the previously empty folder should now show an expander adjacent to it but it does not. With this MR it will.