title: Collection not updating on form submission
body: <p>I have a complex model that looks like this:</p>
  
  <pre><code>public class ModelOne()
  {
      //other stuff
      public ModelTwo modelTwo {get;set;}
  }
  
  public class ModelTwo()
  {
      //other stuff
      public List&lt;ModelThree&gt; modelThrees {get;set;}
  }
  
  public class ModelThree()
  {
      public int Id {get;set;}
      public string Type {get;set;}
  }
  </code></pre>
  
  <p>And a main view</p>
  
  <pre><code>@model ModelOne
  
  @using (Html.BeginForm("blah", "blah", FormMethod.Post, new { id = "blah" }))
  { 
  
      //other form fields
  
      &lt;div id="partial"&gt;
          @{Html.RenderPartial("partialView", ModelOne.modelTwo.modelThrees);
      &lt;/div&gt;
  
       &lt;input id="submitForm" type="submit" value="Submit" /&gt;    
  
  }
  </code></pre>
  
  <p>And a partial view for ModelThree</p>
  
  <pre><code>@model IList&lt;ModelThree&gt;
  
  &lt;table&gt;
      //header
      @{for (int i = 0; i &lt; Model.Count(); i++)
      {
          &lt;tr&gt;
              @Html.HiddenFor(m =&gt; m[i].Id)
              &lt;td&gt;
                  @(Html.Kendo().ComboBoxFor(m =&gt; m[i].Type)
                      .Filter("contains")
                      .Placeholder("Select type...")
                      .DataTextField("Text")
                      .DataValueField("Value")
                      .BindTo(new List&lt;SelectListItem&gt;() {
                          new SelectListItem() {
                              Text = "Some type", Value = "SomeType"
                          },
                          new SelectListItem() {
                              Text = "Other type", Value = "OtherType"
                          }
                      })
                      .HtmlAttributes(new { style = "width: 250px;" })
                  )
              &lt;/td&gt;
          &lt;/tr&gt;
      }}
  &lt;/table&gt;
  </code></pre>
  
  <p>Everything with the exception of the <code>ModelThree</code> collection submits on the form submission.</p>
  
  <p><code>ModelThree</code> binds initially as it should, if I add objects to my list in the constructor they render as expected but are never updated when I submit the form. Whether I add items (I excluded the add logic from this example) or update existing ones via the generated dropdown lists.</p>
  
  <p>What do I need to do to have this submit correctly? The generated HTML looks normal with indexing, as I understand it should figure out how to bind it from there.</p>
  
  <p>Note: I have also tried generic dropdownlist instead of kendo combo list, same result.</p>