Add full path to tooltip text for track label.  Addresses #334
Add full path to tooltip text for track label.  Addresses #334

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