Steps to reproduce

1. Install Ibexa DXP v4.6
2. Go to any content and select sub-items tab
3.  Change preview view to grid 

Result

awhile we can see empty dropdown and when we move cursor under dropdown (so that cursor change to pointer) and click that changing view to first one.

Expected

We shouldn't see empty dropdown and clicking under dropdown should not any action

Note

I checked many places with dropdown and all have this same issue 

I checked many places with select dropdown and all have this same issue