Replaced var keyword with let/const, this fixes #11473

[Josephsanya]

Fixes #11473

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[codeclimate[bot]]

Code Climate has analyzed commit 9c395321 and detected 0 issues on this pull request.

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[github-actions[bot]]

This pull request generated screenshots of many common pages in the running app. You should be able to download and view them here: https://github.com/publiclab/plots2/suites/8758903858/artifacts/397001819

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[TildaDares]

Congratulations on merging your PR @Josephsanya 🎉

[TildaDares]

Thank you for the review @PeculiarE❤️