message: Group: fixed styles for inner Separators and Headers
diff: padding-bottom: 8px;
  }
  +.Group__inner > .Separator {
  + padding-top: 8px;
  + padding-bottom: 8px;
  +}
  +
  +.Group__inner > .Separator + .Header {
  + margin-top: -8px;
  +}
  +
  .Group:last-of-type .Group__inner + .Group__separator {
  display: none;
  }
  padding-right: 8px;
  }
  -.Group__inner--sizeX-regular > .Separator {
  - margin-top: 8px;
  - margin-bottom: 8px;
  -}
  -
  .Group:last-of-type .Group__inner--sizeX-regular + .Group__separator {
  display: block;
  }
  