fix translation source in directEditing templates
fix translation source in directEditing templates

The 'Empty file' string is translated in `lib` - not in `core`.

Signed-off-by: Azul <1768d39c5bb4a98329b02421d5cdd1466cfe6998@riseup.net>

nextcloud/server,nextcloud/server,nextcloud/server,nextcloud/server