There are many problems with the Desktop icons extention and Ubuntu should probably choose Desktop icons NG instead https://extensions.gnome.org/extension/2087/desktop-icons-ng-ding/
Translations are unfinished with Desktop Icon and the menu isn’t coherent with Nautilus.
This is with Desktop icons NG:
Translations seems to be more complete and menus are coherent with Nautilus.
Desktop icons NG is still actively developed, have new options and support Drag’n’Drop with Nautilus. The original Desktop icons development is too slow.
Integration with gnome-control-center would be great too. This has been discussed here: Show Desktop Icons