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In anaconda 19.31.21-1, the Welcome screen and the Language Support screen use the two-panel form for selection, which is quite helpful and intuitive. Perhaps it would make sense to redesign the Keyboard Layout spoke to look a similar way to reinforce the user experience on how to customize languages and dialects for both locales and keyboards.
We can explore this idea in Fedora, but not for RHEL-7. At least until something for this idea is first implemented and released in Fedora.