Show footnote 4 if applicable on the query detail page

[danielaparker]

Currently result lists that are sorted before comparison are flagged with footnote 4 on the main comparison page, see e.g. https://cburgmer.github.io/json-path-comparison/#union_with_keys_after_recursive_descent. There is however no indication that this is the case on the detail page, see the corresponding Union with keys after recursive descent. It would be helpful if the "Footnotes" section on the detail page included footnote 4 in these cases.