title: Change spinner background color but keep arrow
body: <p>I've read several thing about it but I can't find what I need.
  I want to keep the grey arrow but I want to remove the horizontal bar from the default style and have a white background. Do you have any idea of how I can do this ?</p>
  
  <p>Here is what I have now (default spinner style) :</p>
  
  <p><img src="https://i.stack.imgur.com/T1lIj.png" alt="enter image description here"></p>
  
  <p>Here is what I want :</p>
  
  <p><img src="https://i.stack.imgur.com/DX4jK.jpg" alt="enter image description here"></p>