fixes #1973

[mkerjean]

Motivation for this change

Fixes #1973

There are missing instances at the end of the factory PreTopologicalLmod_isConvexTvs, so it only constructs a uniform space, not a ConvexTvs. This PR declares the missing instances via the PreTopologicalNmodule_isTopologicalNmodule, TopologicalNmodule_isTopologicalLmodule, and Uniform_isConvexTvs factories.

Checklist

• added corresponding entries in CHANGELOG_UNRELEASED.md

• added corresponding documentation in the headers

Reference: How to document

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[affeldt-aist]

Well spotted! Since moreover this is already in use in a PR where it has been shown to work, let's merge. fyi: @Tragicus