Import description from owntracks no longer valid

[chr-ftw]

There is no longer a download button in the topright corner of owntracks frontend. See https://github.com/owntracks/frontend/issues/122

See picture, also here: https://dawarich.app/docs/tutorials/import-existing-data

[saschazepter]

Duplicates #276.

[Freika]

Fixed in https://github.com/Freika/dawarich/pull/328, will be available in the next release