discourse/app/assets/stylesheets/common/admin/flags.scss

.admin-flags__header {
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;

  .btn-primary {
    align-self: center;
  }

  h3 {
    margin-top: 1em;
    font-size: var(--font-0);
    font-weight: normal;
    flex-basis: 100%;
  }
}