HTML Widgets; ParametersHost.SetParameterValueByName not respecting 'highlight' parameter

When calling the SetParameterValueByName method of the widget.UI.ParametersHost control, the third, optional, parameter is named 'highlight'.

If this is omitted or true then setting the value of the parameter will also highlight it.

However, if the third parameter was set to false, it was still, incorrectly, highlighting the control, as per the example below:

phUserDefined.SetParameterValueByName("MarketingSource", "TV", false);