Gnome Slab missing system info?

I think I messed up…
I have a machine that acts as a file server, running 11.0, with the Gnome desktop. I tried to remove Mono from the system. I guess I was successful. However, I notice now, that some of the ‘stuff’ is gone from my slab menu on the right. The options to logout, restart, shutdown…are all gone.

I’ve installed libslab again, but it did not make any difference.

Can anyone point me in the right direction to get these back.