title: Change the MenuItem icon in angular ui.gird
body: <p>How to toggle the customizing_column_menu icons in angular ui.grid like shown below</p>
  
  <p><img src="https://i.stack.imgur.com/zXOVG.png" alt="enter image description here"></p>
  
  <p><img src="https://i.stack.imgur.com/txI53.png" alt="enter image description here"></p>