Fix startBP error when clicking on track while it is loading.
Fix startBP error when clicking on track while it is loading.

NabaviLab/CNV-Visualizer,igvteam/igv.js,igvteam/igv.js,NabaviLab/CNV-Visualizer,NabaviLab/CNV-Visualizer,NabaviLab/CNV-Visualizer,NabaviLab/CNV-Visualizer