Links to, and provides a link from, an editors' footnote or endnote reference using {{user:mdswbkq/sandbox/ednote note|note#}}, where note# is alphanumeric (no symbols, please).
Usage is "{{user:mdswbkq/sandbox/ednote note|note#}}", which results in "Ed. Note note#.↑ ".
The corresponding reference in text is inserted using {{user:mdswbkq/sandbox/ednote ref}}.