This adds tests to check that the revisit buttons on the Review step are working correctly.
Also some minor cleanup, namely making case used in the names of describe and test more consistent and moving render functions outside of functions selecting targets to make the structure easier to go through.
This adds a component prop to the expandable button, solving the `Warning: validateDOMNesting(...): <button> cannot appear as a descendant of <button>.` warning that was repeatedly printed to the test output.
This aligns Revisit step buttons on the Review step with the second column of description lists.
The formatting of the expandable's toggleContent is formatted the same way as the main content. That way if the value of min-width gets updated, the spacing will stay consistent.
The duplicate code was moved to `composeExpandable` function that takes two arguments - name of the expandable/step and a stepId that links to the correct step in the Wizard.
