My attempt to cherry-pick things from #980 that work with current `main`#987

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dhess/georgefst/zurihac

Commits on Jun 11, 2023

rename type var

georgefst
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dhess
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render types as square and terms as round

georgefst
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colour all nodes/flavors

georgefst
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use left arrows for all sorts of application

georgefst
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dhess
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remove pattern node labels

georgefst
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dhess
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refactor to pave way for vertical separation of types and terms
georgefst
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show types on separate row above terms
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post-rebase fix - make holes rounder as intended
georgefst
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