Toggling off the Gameplay Filter Tag causes all Content assets to be shown

Toggling off the Gameplay Filter Tag causes all Content assets to be shown in the Content Browser.

This reported and tested in 4.19.2 (CL-4033788) and tested in 4.20 (CL-4212847) and Main 4.21 (CL-4221482)

1. Open the UE4 Editor and create a Third Person Project
2. Click on Filters > Other Filters > and select Gameplay Tags
3. Toggle Gameplay Tags off

Results: Every asset under Content is showed

Expected: Previous folder hierarchy is shown