message: limiting the slider range for vertical sliders
diff: @@ -317,7 +317,7 @@ Interface.Slider.prototype._ondrag = function(e, pointer){
  } else {
  var yVal = Math.max((pointer.pageY - this.top ), 0);
  normPos = yVal / (this.container.height());
  - normPos = 1 - normPos;
  + normPos = Math.max(1 - normPos, 0);
  }
  normPos = Math.pow(normPos, this.exp);
  