Upstreaming from http://fab.wmflabs.org/T421
On https://secure.phabricator.com/maniphest/query/authored under "Batch Task Editor" there is an "Export to Excel" button.
Some users might not have the Excel application installed but should still be able to handle "application/vnd.openxmlformats-officedocument.spreadsheetml.sheet" / Excel2007 files via other applications (e.g. LibreOffice), hence proposing to rephrase.
* src/applications/maniphest/view/ManiphestTaskResultListView.php
* src/applications/maniphest/controller/ManiphestExportController.php