filesystem: add mac os x directory watcher this code is incredibly stinky tbh we should probably be using C++ threads everywhere else just because they are SO much easier to code for than the shitty Qt threads API

// Labels

.label-variant(@color) {
  background-color: @color;

  &[href] {
    &:hover,
    &:focus {
      background-color: darken(@color, 10%);
    }
  }
}