Can't undo the import of a WAD #2
Description
Sometimes I load a WAD and import/delete a few times to find how levels look in the editor. The import isn't pushed to the undo stack, so I have to delete the node by hand every time.
To reproduce, simply import a WAD and hit undo. It will undo the action that came before the import.
Running MacOS 10.15.7 + Godot v3.3.stable.official