Only retry fetching the profile, not updating the local state with the result.

The `store.profile.read` operation which fetches the profile is done in
a loop until it succeeds, on the basis that network requests may fail if
connectivity is intermittent. The `update` step should always succeed
however, so move it out of the loop.

src/sidebar/session.js

@@ -57,8 +57,9 @@ function session($q, $rootScope, analytics, annotationUI, auth,
         if (authority) {
           opts.authority = authority;
         }
-        return store.profile.read(opts).then(update);
+        return store.profile.read(opts);
       }).then(function (session) {
+        update(session);
         lastLoadTime = Date.now();
         return session;
       }).catch(function (err) {