File deletion doesn't work

[ArsenijeD]

Steps To Reproduce:

1. Open already existing project in VSCode.
2. Add a few already existing files to the favorites.
3. Create new empty file within the project (for example, name it FileToDelete).
4. Add it to the favorites.
5. Right click on the FileToDelete in favorites tree and delete it (choose yes for permanent delete).

Result:

All the files (including the FileToDelete) are disappeared from the favorites tree. All of them except FileToDelete are still on the file system.

Expected Behaviour:

Only FileToDelete should be deleted both from favorites tree and file system.