correct the compound tab le-lle biplot navigation function.

Former-commit-id: badfa42f28deaf1a7b2ca206f9052aded8a7b5e4

ippisite/ippidb/templates/base.html

@@ -147,8 +147,9 @@
                 });
                 document.getElementById(canvasId).onclick = function(evt){
                     var activePoints = scatterChart.getElementAtEvent(evt);
+                    var datasetIndex = activePoints[0]._datasetIndex;
                     var selectedIndex = activePoints[0]._index;
-                    var id = scatterChart.data.datasets[0].data[selectedIndex].id;
+                    var id = scatterChart.data.datasets[datasetIndex].data[selectedIndex].id;
                     window.location = '/compound/'+id;
                 };
             };