Rename "sampleHeight" option for seg/mut tracks to "displayMode" for consistency with other track types.  Also sample height:  implies you can set the sample height, which you can't.
Rename "sampleHeight" option for seg/mut tracks to "displayMode" for consistency with other track types.  Also sample height:  implies you can set the sample height, which you can't.

igvteam/igv.js,igvteam/igv.js