title: polymer select values not set
body: <p>I've setup a JSbin to show an issue I'm having with a polymer select box not reflecting the model (initially), however, the model does get updated after selecting an option. Note that in my example, I'm ensuring the model is loaded after the select options are populated, however, I guess the tricky thing here is that the select box population is a nested dom-repeat  (thus when module is populated, the nested dom-repeat for the 'select' must be re-populated - I'm guessing).  </p>
  
  <p>Here's the bin and how to test it to show the dilemma.</p>
  
  <p><a href="http://jsbin.com/xucavi/edit?html,console,output" rel="nofollow">http://jsbin.com/xucavi/edit?html,console,output</a> </p>
  
  <p>After page loads, note there are no selections made in the 2 select boxes.  Click the 'Display Values from Model' button. Note that the values show the model has values.  Select 'Digital' for each of the 2 select boxes.  Now click the 'Display Values from Model' button again - and note that model has been updated.</p>
  
  <p>Any thoughts on how to work around this?  Thanks</p>