.caret {
  display: inline-block;
  width: 0;
  height: 0;
  margin-left: 2px;
  vertical-align: middle;
  border-top:   @caret-width-base dashed;
  border-top:   @caret-width-base solid ~"\9"; // IE8
  border-right: @caret-width-base solid transparent;
  border-left:  @caret-width-base solid transparent;
}
