adding welcome screen

lib/services/tracking/Tracker.js

@@ -70,11 +70,11 @@ export const trackMainEvent = async () => {
   }
 };
 
-export const trackFeature = async (feature) => {
+export const trackPoi = async (poi) => {
   if (!(await shouldTrack())) return;
 
   const trackingObj = await enrichTrackingObject({
-    feature,
+    feature: poi,
   });
 
   await sendTrackingData('/feature', trackingObj);