The Node Editor Add menu has filters for not drawing asset catalogs in
the root level. This is done so that catalogs that share names with
built-in menus are appended to said menus.
There is no "Unassigned" built-in menu, just a root level asset menu for
unassigned assets. This menu does not currently have the behavior to
support appending catalogs to it, so assigning assets to a catalog named
"Unassigned" renders said assets unaccessible in the Add Menu.
This patch removes that filter as it was deemed better to just allow the
user to have a root level catalog menu named "Unassigned" instead of
mushing it with the menu for unassigned assets.
Pull Request: https://projects.blender.org/blender/blender/pulls/138874
dd698d4f24