title: Add multiple Templates in one Yield
body: <p>I want to add multiple Bootstrap Modals in one Yield.</p>
  
  <pre><code>Router.route('test', {
      yieldTemplates: {
          'contentTemplate': {to: 'content'},
          'modal1Template': {to: 'modal'},
          'modal2Template': {to: 'modal'}
      }
  });
  </code></pre>
  
  <p>This code adds only the last template to the yield -modal-. Is it possible to add multiple templates to one yield or do anybody know a best practice for this situation?</p>