message: Fix `clean-dashboard` spacing of grouped items
diff: /* Drop "box" style from the repos */
  .rgh-clean-dashboard .news .body .Box {
  - padding: 0 !important;
  - margin-top: 0 !important;
  + padding-inline: 0 !important;
  + padding-block: 5px !important;
  border: none;
  background: none;
  }
  +/* Drop "box" style from the repos, only when not grouped */
  +.rgh-clean-dashboard .color-border-muted > .flex-column > .Box {
  + padding-block: 0 !important;
  + margin-top: 0 !important;
  +}
  +
  /* Add "box" style to each event group */
  /* This exact `>` sequence ensures it works on ajaxed-in events */
  .rgh-clean-dashboard [role='tabpanel'] [data-repository-hovercards-enabled] > [classes] > .body,
  