Fix(accounts): show challenge info on user profile

This changes the behavior of the user profile page to pull the current
challenge info from our challenge map and overwrite the user challenge.
This should also make name changes point to the correct challenge
regardless of the info saved to the user profile

common/utils/create-name-id-map.js

@@ -0,0 +1,12 @@
+// createNameIdMap(entities: Object) => Object
+export default function createNameIdMap(entities) {
+  const { challenge } = entities;
+  return {
+    ...entities,
+    challengeIdToName: Object.keys(challenge)
+      .reduce((map, challengeName) => {
+        map[challenge[challengeName].id] = challenge[challengeName].dashedName;
+        return map;
+      }, {})
+  };
+}