How to reproduce:

1. Open a new project
2. Import attached package (bug.unitypackage)
3. Open scene SomeDir/test.unity
- Make sure no gameobject is selected in the hierarchy view
4. Select the Assets folder in the Project view
5. Go to Tools -> Select Stuff
- This should select the Main Camera in the Hierarchy, as well as ping the TestPing.cs script in the Project view
- However, it does not do that. It simply selects the script in the Project view instead
- Selecting any folder other than Assets causes the script to get pinged properly
- This only happens using the two-column Project window layout and when there is nothing to select in the Hierarchy view (no Main Camera in this case)