Add option to avoid namespace prefixes reserved by QGIS

[JohannaOtt]

According to this issue QGIS has some namespace prefixes reserved for internal use. For users creating data with hale studio and planning to load their data with QGIS, it would be convenient to have an option to avoid these prefixes during data export.

[github-actions[bot]]

This issue has been automatically marked as stale because it has not had activity in the last 60 days. It will be closed in two weeks if no further activity occurs. Thank you for your contributions.