A CLI instruction is missing when adding LXD to MAAS

Seems to be MAAS UI related as this info is not returned back by MAAS API

https://github.com/canonical/maas-ui/blob/a3d831606f29016a6c51f08b49d97161732183be/src/app/kvm/views/LXDSingleDetails/LXDSingleSettings/AuthenticationCard/UpdateCertificate/UpdateCertificateFields/UpdateCertificateFields.tsx#L40

Roughly these instructions from MAAS dev setup should work

echo "To complete the setup point your browser to"
echo " http://${container_ip}:5240/MAAS/r/kvm/lxd"
echo "and do to maas-host -> KVM host settings -> Download certificate."
echo "Install the certificate to your local lxd with:"
echo " lxc config trust add <path/to/maas-host@...>"
echo "Go back to your browser and click 'Refresh host'"

seems to be a CSS issue, we actually have the command in the code

In the original design before moving to side panel, this is what it looks like.
https://app.zeplin.io/project/610abd78c381eeafb70f5b43/screen/6127ffd0d01d2ca28655eb50