Fix bug with loading custom observation fields when several thousand records have been created.
Fix bug with loading custom observation fields when several thousand records have been created.

calonso-conabio/inaturalist,lucas-ez/inaturalist,HotFusionMan/inaturalist,alexshepard/inaturalist,HotFusionMan/inaturalist,alexshepard/inaturalist,pleary/inaturalist,alexshepard/inaturalist,loarie/inaturalist,HotFusionMan/inaturalist,inaturalist/inaturalist,loarie/inaturalist,alexshepard/inaturalist,pleary/inaturalist,HotFusionMan/inaturalist,inaturalist/inaturalist,pleary/inaturalist,alexshepard/inaturalist,inaturalist/inaturalist,calonso-conabio/inaturalist,lucas-ez/inaturalist,lucas-ez/inaturalist,loarie/inaturalist,calonso-conabio/inaturalist,calonso-conabio/inaturalist,calonso-conabio/inaturalist,inaturalist/inaturalist,lucas-ez/inaturalist,pleary/inaturalist,HotFusionMan/inaturalist,loarie/inaturalist,pleary/inaturalist,lucas-ez/inaturalist,inaturalist/inaturalist,loarie/inaturalist