issue with genomic data overlay for few genomes

Closes #1546 (closed)

frontend-js/src/main/js/map/window/AliasInfoWindow.js

@@ -51,7 +51,7 @@ function AliasInfoWindow(params) {
   };
 
   var dbOverlaySearchChanged = function (arg) {
-    return self.update().then(function(){
+    return self.update().then(function () {
       if (arg.object instanceof ChemicalDbOverlay) {
         $("a:contains(chemical)", self.getContent()).click();
       } else if (arg.object instanceof DrugDbOverlay) {
@@ -438,7 +438,9 @@ AliasInfoWindow.prototype.createGenomicDiv = function (params) {
   return Promise.all(promises).then(function (result) {
     promises = [];
     result.forEach(function (overlayEntries) {
-      overlaysData = overlaysData.concat(overlayEntries);
+      if (overlayEntries !== undefined) {
+        overlaysData = overlaysData.concat(overlayEntries);
+      }
     });
     return Promise.all(promises);
   }).then(function () {