Export to GeoPackage does not create a spatial index #409

When data are exported to Geopackage from geogig repository e.g. by

geogig geopkg export -i test_data test_data

the resulting database does not contain a spacial index, i.e. the tables "rtree..." are missing. When I do an export from e.g. postgres to GeoPackage with ogr2ogr the index tables do exist. Something like this:

set PG_TEXT="host=localhost user=postgres dbname=XXX password=XXX"
ogr2ogr -f GPKG test_data.gpkg PG:%PG_TEXT% "ga.test_data"

Eventually the problem is, that GeoPackages without spacial index seem to lead to problems in QGis. When I load three or four medium sized GeoPackages (about 100.000 to 200.000 features) in QGis, it is no more possible to edit any of them. If I use instead GeoPackages created via org2ogr (i.e with spatial index), this works.