Add 'calculation type' parameter to measurements

We are using the web mercator projection for a site that is global so the suggestions to change the projection for measurement values is not an option for us:

https://support.geocortex.com/map-measurements-are-incorrect

http://blogs.esri.com/esri/arcgis/2010/03/05/measuring-distances-and-areas-when-your-map-uses-the-mercator-projection/

Can the calculation type parameter be added to the measurement module config parameters in the Geocortex Viewer for Silverlight ?

<MeasurementUnitDefault Value="feet" />
<MeasurementAreaUnitDefault Value="squareFeet" />
<MeasurementProjectionWkid Value="" />
<MeasurementProjectionUnits Value="" />
<MeasurementPredictionEnabled Value="true"/>
<MeasurementOverrideUnits Value="" />
<MeasurementCalculationType Value="preserveShape" />

Where the possible values are planar,geodesic,preserveShape as in the ESRI REST Geometry Service documentation http://serverapps101.esri.com/arcgis/sdk/rest/index.html?lengths.html

This would be a very useful enhancement as we will have to disable the measurement module until we can do this.

Thanks,

Josh