How to restore Ubuntu Mate login manager?

I wanted to try Xubuntu experience on my Ubuntu Mate installation. I've done that by running

apt install xubuntu-desktop

I tried Xubuntu, didn't liked, so I removed it doing

apt purge xubuntu-desktop && apt autoremove

Unfortunately after reboot I still have awful black background login manager from Xubuntu instead of login manager from Ubuntu Mate with nice background and styling. Changing settings in "Login Window" doesn't affect anything and on login screen I seem to still have option to select either "Mate" or "Xubuntu session". Can anyone help me to restore nice, Ubuntu Mate login manager and ideally get rid of that "Xubuntu session" option, please.