title: Colorize variations in backend
body: <p>Do you guys have any idea how i can colorize the backend variation list?</p>
  
  <p>Let's take product "Jeans" as an example.  This product has 3 variations (sizes) like  size 6, size 8 and size 10.   Now, let's say that just 2 variations are available.</p>
  
  <p>If I want to edit the product in backend, and if I click the Variations icon, I have to expand all three variations just to see which one is the one sold out.</p>
  
  <p>I was thinking to a solution in which the "sold out" variation is colored in red and the available one in green.  I think this way it's easier to change the status from available to sold out.</p>
  
  <p>Example provided below:
  - The only available (in stock) variation is 38. The other ones are not available (sold out/out of stock).
  <a href="https://i.stack.imgur.com/XpKdX.jpg" rel="nofollow noreferrer">enter image description here</a></p>
  
  <p>Do you have any idea how this can be done in backend?</p>
  
  <p>Thanks a lot!</p>