Selects the "wrong category" option from the list and starts the explanation text
To be used in conjunction with https://greasyfork.org/en/scripts/19771-trademe-add-report-flag-to-category-index-items
Without this script the variable that adds the details text won't be able to work.
See full docs and why it was created at http://www.itamer.com/tampering-with-trademe/948/
