Calculate height of gene track properly; repack features before sizing
Calculate height of gene track properly; repack features before sizing

itenente/igv,amwenger/igv,godotgildor/igv,amwenger/igv,igvteam/igv,godotgildor/igv,itenente/igv,igvteam/igv,igvteam/igv,igvteam/igv,itenente/igv,itenente/igv,godotgildor/igv,amwenger/igv,amwenger/igv,godotgildor/igv,itenente/igv,igvteam/igv,amwenger/igv,godotgildor/igv