Sorting CSS selectors and selector lists alphabetically

[JeromeGWS]

I'm aware development on this project is dead now but for posterity's sake: something that would be useful is the sorting of CSS selectors and selector lists alphabetically.

In other words:

.container {
  width: 1200px;
}

.button:hover,
.button:focus {
  opacity: 0.8;
}

becomes

.button:focus,
.button:hover
{
  opacity: 0.8;
}

.container
{
  width: 1200px;
}