added geojson as default #410

Author: kshitijrajsharma

ui/app/components/ExportForm.js

@@ -329,7 +329,7 @@ buildings:
         - building
     where: building IS NOT NULL
       `.trim(),
-      export_formats: ["geopackage"]
+      export_formats: ["geojson"]
     }
   };
 };