Until we can preinstall flatpaks, we need the apps in the
base image that are needed for first login. Thats yelp, which
is used for the "welcome tour" part of the inial setup experience.
This sync also pulls in the new backgrounds package.
At some point I want to add a `usr_bin_sbin_unification: true`
option or so to rpm-ostree, and having `usermode` blocks that.
Also this is a weird legacy Red Hat-ism tool.
Some stuff like `telnet` is in both `standard` and `gnome-desktop`.
We currently need to blacklist both. I think we should massively
prune comps but...
