Hey @andreas-doehler
I found out, that there is a permission setting for this in the Matrix. Go
to Setup → Users → Roles & permissions, and edit the “admin” role (e.g.).
There’s a section “Commands on host and services” (BTW: localization guys: Typo… this should be hosts, plural!), where the setting for “Enable/disable checks” is set to “default (no)”. If you change
this, the commands can be selected again.
Thomas