Cannot delete empty directory [#20230]

[willyvds]

Sometimes the location node has an empty directory in MM, while the directory does not exist anymore on the drive.
I can't manage to delete such a directory from MM.
There are multiple empty directories in the tree. Neither of them can be deleted.

[Lowlander]

Thanks for reporting, I can reproduce: https://www.ventismedia.com/mantis/view.php?id=20230