As a program manager I want to export program items to Excel with selected fields, dimensions and annotations

# Field selection when exporting program items

While checking the accessibility information for Ropecon, @tiittapauppi would like an Excel export of accepted program items (= program items selected by dimensions) with only selected fields (`description`), dimensions (`accessibility`) and annotations (`ropecon:accessibilityOther`) to check that there is not anything stupid in them.