Updating and adding tests for better test coverage#1122

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fstroth wants to merge 3 commits intoairctic:masterfrom fstroth:test_coverage

+199-1

Commits on Jul 17, 2022

(Testing) Added tests for the model choice widgets and the ckeckpoint loading and saving.
frederik
committed

Commits on Jul 18, 2022

(Tests) Added some tests.
frederik
committed
(Tests) Removed bad test.
frederik
committed