Use New Image Replacement Hack

Created by: TechRemarker

Rather than text-indent: -99999px which actually forces the browser to draw that canvas use the performance savings variation of text-indent: 100% for the caret class in dropdown.less. See Zeldman.com's post today for details:

http://www.zeldman.com/2012/03/01/replacing-the-9999px-hack-new-image-replacement/

.hide-text {
text-indent: 100%;
white-space: nowrap;
overflow: hidden;
}