Hi i figured out what to do in this case. I did a
sudo apt-get install --reinstall ubuntu-desktop
and it came back. But while doing this some of the unwanted softwares that in uninstalled earlier also came back (like thunderbird, libreoffice math etc)
This did the trick for me:
sudo apt install unity-control-center
For some reason i had previously installed
They look almost identical, but the "Appearance" icon is missing.