.grid-toolbar {
  .action.btn {
    height: 27px;
    margin-right: 5px;
    padding: 0 5px;
    &:last-child {
      margin-right: 0;
    }
  }
  a.action.btn {
    font: 0/0 a;
    color: transparent;
    text-shadow: none;
    background-color: transparent;
    i {
      font: @baseFontSize/26px 'FontAwesome';
      color: @btnTextColor;
      &.hide-text {
        .hide-text();
      }
      &:before {
        line-height: 26px;
        margin: 0;
      }
    }
  }
}

.grid-toolbar {
  .action.btn {
    height: 27px;
    margin-right: 5px;
    padding: 0 5px;
    &:last-child {
      margin-right: 0;
    }
  }
}
.grid-toolbar .actions-panel.pull-right {
  /* hide text label for actions in right panel */
  .action {
    font: 0/0 a;
    color: transparent;
    text-shadow: none;
    background-color: transparent;
    [class^="icon-"], [class*=" icon-"] {
      font: @baseFontSize/26px 'FontAwesome';
      color: @btnTextColor;
      &.hide-text {
        .hide-text();
      }
      &:before {
        line-height: 26px;
        margin: 0;
      }
    }
  }
}

Migrate Data Grid Column Manager in AE project
BAP-9089: Migrate Data Grid Column Manager in AE project

 - fixed styles
