Fix track and validation Swing EDT issues.  Addresses #360
Fix track and validation Swing EDT issues.  Addresses #360

amwenger/igv,amwenger/igv,amwenger/igv,igvteam/igv,amwenger/igv,amwenger/igv,igvteam/igv,igvteam/igv,igvteam/igv,igvteam/igv