Comment 4 for bug 1924664

Thanks for the clarification. Accordingly, I have added libgtk3-nocsd0 to the i386 whitelist and built the new 3-1ubuntu2 libgtk3-nocsd0 package in mantic. https://launchpad.net/ubuntu/+source/gtk3-nocsd/3-1ubuntu2

Fixing this for focal and jammy would require a reupload for those series; unfortunately, because the powerpc architecture was dropped between the bionic and focal releases, I can't simply forward-copy the binaries from bionic.