re-add export feature for organisation-wide stats
Created by: adipasquale
retour de https://trello.com/c/Zg9300Vj/900-extraction-des-stats-publiques suite a revert
cc @yaf
Created by: adipasquale
retour de https://trello.com/c/Zg9300Vj/900-extraction-des-stats-publiques suite a revert
cc @yaf