Fix regular track config flash (#765)

src/content/app/genome-browser/components/browser-track-config/BrowserTrackConfig.tsx

@@ -52,6 +52,10 @@ export const BrowserTrackConfig = () => {
   const trackType = getTrackType(selectedCog);
   const { toggleApplyToAll } = useBrowserTrackConfig();
 
+  if (!trackType) {
+    return null;
+  }
+
   const radioOptions: RadioOptions = [
     {
       value: 'this_track',

src/content/app/genome-browser/state/track-config/trackConfigSlice.ts

@@ -130,6 +130,10 @@ export const saveTrackConfigsForGenome: ActionCreator<
 
 // TODO: get proper data from the backend in order not to hack track id
 export const getTrackType = (trackId: string) => {
+  if (!trackId) {
+    return null;
+  }
+
   if (trackId.startsWith('gene')) {
     return TrackType.GENE;
   } else {