title: Multiple level/criteria sorting using wijmo ICollectionView
body: <p>Does Wijmo have functionality to add additional levels of sorting in cases where the first search criteria is a match? This secondary search would only be used in cases where the primary criteria are a match. </p>
  
  <p>For example, if my two columns were State and Town, and I wanted to sort the states in ascending order, but the towns within those states in descending order. So my list might read something like</p>
  
  <p>NV | Las Vegas</p>
  
  <p>NV | Ely</p>
  
  <p>NY | Saratoga</p>
  
  <p>NY | New York City</p>
  
  <p>NY | Albany</p>