Outdated range slider documentation

[Svetoslavb04]

The documentation for the range slider is outdated.

Link: https://www.jqwidgets.com/jquery-widgets-documentation/documentation/jqxrangeselector/jquery-rangeselector-api.htm

Examples:

labelsOnTicks is missing, labelsFormat is listed as labelFormat, markersFormat is listed as markerFormat, labelsFormatFunction is not listed, markersFormatFunction is not listed, showGroupLabels is not listed, labelPrecision and markerPrecision are missing