Blank tooltip on hovering expanded empty folder

[jeremypw]

I have searched open and closed issues for duplicates.

Describe the bug

In the Folder Manager, it is possible to expand empty subfolders, resulting in a blank row. Hovering this row results in a dark rectangle appearing, which is a tooltip containing no information.

Expected behavior

No tooltip should appear for blank dummy rows.

Platform Information

Elementary Juno unstable I'm using the latest version from git that I've manually compiled