title: Kendo UI combobox with filterable multi columns
body: <p>I been trying to implement this without success. Here is my scenario:</p>
  
  <p>I need to implement a kendo Combobox with the text enable, so you can input some text and it will find any matching record, but, also, if I click the drop down arrow, it shows a grid inside it with  all matching records (partial search) and it shall allow filtering in the column's header.</p>
  
  <p>I have seen sample, for DropDownList, with a grid inside but you are not able to type a text in the text box.</p>
  
  <p>Has anyone have a sample on how to implement this?</p>
  
  <p>thanks in advance for your replies</p>
  
  <p>Ron</p>