update

bi/sliders.css

@@ -1,4 +1,5 @@
 .bi-single-slider-button .slider-button {
+  cursor: ew-resize;
   -webkit-box-shadow: 0 0 10px rgba(0, 0, 0, 0.2);
   -moz-box-shadow: 0 0 10px rgba(0, 0, 0, 0.2);
   box-shadow: 0 0 10px rgba(0, 0, 0, 0.2);

bi/sliders.js

@@ -11,7 +11,7 @@ BI.SliderIconButton = BI.inherit(BI.Widget, {
         BI.extend(BI.SliderIconButton.superclass._init.apply(this, arguments));
         this.slider = BI.createWidget({
             type: "bi.icon_button",
-            cls: "cursor-drag widget-slider-icon slider-button",
+            cls: "slider-icon slider-button",
             iconWidth: 14,
             iconHeight: 14,
             height: 14,