Enum.GetNames replaced with IToText on enum label generation to leverage DisplayText attribute

[pawelbaran]

Issues addressed by this PR

Closes #447

Test files

Create DensityExtractionType enum in Grasshopper and see if the first option shows as AllMatching (current) or All matching. (desired).

Changelog

Additional comments

[adecler]

Thanks @pawelbaran ,

The code change makes sense and we now have the expected behaviour in the UI:

[pawelbaran]

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[bhombot-ci]

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[pawelbaran]

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[bhombot-ci]

@pawelbaran to confirm, the following actions are now queued:

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[pawelbaran]

@BHoMBot check ready-to-merge

[bhombot-ci]

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