title: Kendo grid export to excel header title shows html characters
body: <p>When I export my grid to excel,headers are like: <b>Product Name</b>,<code>{{'unitsOrder'| translate}}</code> in excel. My grid supports 2 languages and I am showing it with angularjs translate way. Any offer?</p>
  
  <pre><code> &lt;script&gt;
      $("#grid").kendoGrid({
          toolbar: ["excel"],
          excel: {
              fileName: "Kendo UI Grid Export.xlsx"
          },
          dataSource: {
              type: "odata",
              transport: {
                  read: "http://demos.telerik.com/kendo-ui/service/Northwind.svc/Products"
              },
              pageSize: 7
          },
          sortable: true,
          pageable: true,
          columns: [
              { width: 300, field: "ProductName", title: "&lt;b&gt;Product Name&lt;/b&gt;" },
              { field: "UnitsOnOrder", title: "{{'unitsOrder'| translate}}" },
              { field: "UnitsInStock", title: "Units In Stock" }
          ]
      });
  &lt;/script&gt;
  </code></pre>