message: Avoid issue list header overlap
diff: @@ -789,7 +789,8 @@ a.tabnav-extra[href$='mastering-markdown/'] {
  .issues-listing .table-list-header {
  position: sticky;
  top: 0;
  - z-index: 30; /* Must be above .modal-backdrop (z-index 20) #1317 */
  + /* Must be above .modal-backdrop (z-index 20) #1317 and below .select-menu.active (z-index 30) */
  + z-index: 25;
  }
  :root .select-menu-list {
  /* Since the header is sticky, filters must now fit the viewport */
  