Fix bug where file was not properly deleted. (issue #123)
Fix bug where file was not properly deleted. (issue #123)

After the move to the app/ folder, it was not finding the file. I added
ELAB_ROOT.

elabftw/elabftw,elabftw/elabftw,elabftw/elabftw,elabftw/elabftw,elabftw/elabftw