title: Add custom menu item to column menu in angular ui grid
body: <p>I want to add a custom menu item to column menu in ui-grid.</p>
  
  <pre><code>$scope.gridOptions = {
                      paginationPageSizes: [25, 50, 75],
                      paginationPageSize: 25,
                      enablePaginationControls: true,
                      useExternalPagination: true,
                      useExternalSorting: true,
                      enableScrollbars: true,
                      enableColumnMenu: true,
                      enableRowSelection: true,
                      enableSelectAll: true
  }
  </code></pre>
  
  <p><a href="https://i.stack.imgur.com/Tc4iz.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/Tc4iz.png" alt="enter image description here"></a></p>
  
  <p>Please help.</p>