message: Group component fixes after design review
diff: /* Offsets and separators */
  -.Group__inner > *:not(.Header):first-child {
  +.Group__inner > *:not(.Header):not(.Tabs):first-child {
  border-top: 8px solid transparent;
  }
  position: relative;
  border-radius: 8px;
  box-shadow: inset 0 0 0 1px var(--input_border);
  - padding: 0 12px;
  + padding: 0 8px;
  }
  -.Group__inner--sizeX-regular > .Header:first-child {
  +.Group__inner--sizeX-regular > .Header:first-child,
  +.Group__inner--sizeX-regular > .Tabs:first-child {
  border-top: 4px solid transparent;
  }
  