title: Set default filter for Kendo UI Grid
body: <p>I have a Kendo UI grid that is rendered with javaScript. I want the string columns to have a single option ("Contains") and without the second filter. So far so good, I wrote</p>
  
  <pre><code>        $("#MyGrid").kendoGrid({
              // other bits of configuration here
              filterable: {
                  extra:false, 
                  operators: {
                      string:{ contains: "Contains"}
                  }
              },
              // more bits of configuration here
          });
  </code></pre>
  
  <p>As part of the definition of the grid. And the result looks good-ish (I only have one option, so the drop down is redundant).</p>
  
  <p><img src="https://i.stack.imgur.com/FnFyn.png" alt="Filter as I defined"></p>
  
  <p>However, regardless of this, the filter still performs the equals operation rather than the contains operation (which is the only one available to it).</p>
  
  <p>I've spent a while trying to figure this out and I keep going around in circles because the code I found either does not work, or doesn't make sense, or both.</p>
  
  <p>Can anyone tell me how to default the filter to "Contains" and not "Is Equal To"?</p>