wagtail/client/scss/layouts/_redirects.scss

.redirects .listing-with-x-scroll {
  display: block;
  overflow-x: auto;
  white-space: nowrap;
}

.redirects header .right {
  display: flex;
}

.redirects header .right .actionbutton {
  margin-inline-start: 10px;
}

.redirects header .right .dropdown {
  margin-inline-start: 10px;
}