PopupMenu - Items list and button disappears after selecting AtlasTexture as icon

[finalwarp]

Godot version: 3.2.3

OS/device including version:

Issue description:

After adding an Item in the Items List Editor and selecting "AtlasTexture" as an icon, all the items in the editor disappear and I can no longer open the window after closing it. I had to modify the scene in a text editor to fix it. This doesn't happen with the other textures in the list

Steps to reproduce:

Minimal reproduction project: I hope the gif is enough

[KoBeWi]

Duplicate of #28211