Add a simple "user page" that shows the kudos received by a single user.
Fix for when seaching for a string in the users name.
Refreshing on the callbacks to avoid the flickering effect on latency network.

Binding directly the model variable to the promise of query()/get() was causing
some "flickering" effect when users have a high latency with the server.

Now, we only update the model when the GET query successfully return seems.