Bug#659318: gnome-shell: Can not open system setting from the option in the right-top corner popup

[Emil Goode]

I had the same issue with opening the system settings. It turned out
that the gnome-control-center had been uninstalled at some point and
after installing it again everything is back to normal.
I have no idea why the gnome-control-center got uninstalled, maybe some
update caused it.

Best regards,
Emil Goode