title: how to save a SlickGrid column order (js)?
body: <p>I have two grids in my application.</p>
  
  <pre><code>var columns1 = [
      {
          name: "Address",
          field: "address"
          id: "address",
          sortable: true
      }
  ]
  
  var columns2 = [
      {
      {
          name: "Rating, in %",
          field: "rating"
          id: "rating_percent",
          resizable: false
      }
  ]
  </code></pre>
  
  <p>They are absolutely independent from each other. Also, I have some grid events descriptions in another <code>js</code> file.</p>
  
  <pre><code>    grid.onColumnsReordered.subscribe(function (e, args) {
          _this.updateHeaderRow();
              // here
      });
  </code></pre>
  
  <p>When user changes the columns order, then I want to save this order. Should I change (overwrite) the DOM elements, I mean <code>column1</code> and <code>column2</code>?
  So question: how can I save the columns order? </p>