Wallet/src/sass/views/advancedSettings.scss

#advanced-settings {
  .list {
    .item {
      &:before {
        display: block;
        position: absolute;
        width: 100%;
        height: 1px;
        background: rgba(221, 221, 221, 0.3);
        top: 0;
        right: 0;
        content: '';
      }
      &.item-divider {
        color: $dark-gray;
      }
      .item-note {
        color: $dark-gray;
      }
    }
    .has-comment {
      border-bottom: 0 none;
    }
    .comment {
      padding: 15px;
      background-color: #fff;
      color: $mid-gray;
    }
  }
}