message: Fix `safer-destructive-actions` on comments
diff: /* Move "close issue" and "cancel" buttons on authoring comments to the left */
  /* ...in issue comment form */
  +/* the legacy way (kept for GitHub Enterprise) */
  .form-actions .btn.js-comment-and-button {
  float: left;
  }
  +/* the current github.com way */
  +#partial-new-comment-form-actions > .d-flex {
  + justify-content: space-between !important;
  +}
  +
  /* ...in comment edit form */
  div.previewable-edit .previewable-comment-form .form-actions {
  margin-left: 10px;
  