New ubuntu-unity iso

Sure, in the available patches there is one called 12_unity_launcher_support.patch, it likely adds that ‘feature’.
I don’t use because it creates the dbus nonsense with the typical xdg folders in the default quicklists.
I may reconsider that, may not.
If you want to build yourself you can add that patch. Or it’s probable you could just use the nemo3 ppa’s artful nemo packages in bionic, it’ll have that patch applied.