Autouse temp config context manager

[t-young31]

Resolves #227

This was surprisingly easy – thought there would be more places where the Config was modified and then needed to be put back. Seems to work as intended

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Checklist

• [x] The changes include an associated explanation of how/why
• [x] Test pass
• [x] ~Documentation has been updated~ Not needed

[codecov[bot]]

Codecov Report

:exclamation: No coverage uploaded for pull request base (v1.4.0@23af779). Click here to learn what that means. The diff coverage is n/a.

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Flag	Coverage Δ
unittests	97.31% <0.00%> (?)

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