title: Kendo Grid, how to make column filterable by dropdown menu?
body: <p>I would like to ask, how to change in Kendo Grid component column filterable input (see image below) into dropdown menu with two given values (CZ and EN)?</p>
  
  <p><img src="https://i.stack.imgur.com/HjzpC.png" alt="enter image description here"></p>
  
  <p>Many thanks for any help.</p>
  
  <p>EDIT:</p>
  
  <p>I tried to do by this way, but with no effect:</p>
  
  <pre><code> {
                  field :"language",
                  title : $translate.instant('LANG'),
                  type: "string",
                  width:220,
                  filterable: {
                    ui: function (element) {
                      element.kendoDropDownList({
                        dataSource: ['CZ','EN'],
                        optionLabel: "--Select Value--"
                      });
                    }
                  }
              },
  </code></pre>