[Merge] livecd-rootfs:sil2100/appliance-images into livecd-rootfs:ubuntu/bionic

[Łukasz Zemczak]

Got a +1 from Steve on getting this merged. We can always revert if we decide we want to go a different route.
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https://code.launchpad.net/~ubuntu-core-dev/livecd-rootfs/+git/livecd-rootfs/+merge/387019
Your team Ubuntu Core Development Team is requested to review the proposed merge of livecd-rootfs:sil2100/appliance-images into livecd-rootfs:ubuntu/bionic.