Measurement 2D (AreaMeasurement2DViewModel and DistanceMeasurement2DViewModel) - add possibility to override the default symbology

[nadja_swiss_parks]

This idea requests a custom symbology for the 3D measurement widget. We suggest to add a possibility for a custom symbology also for the 2D measurement widgets (thus a new idea). The AreaMeasurement2DViewModel and DistanceMeasurement2DViewModel could be extended to provide a polygonSymbol and a polylineSymbol property like the SketchViewModel offers. 

We suggest this as it is crucial to our application to blend in with the website, where the application will be hosted.

[Noah-Sager]

Thanks for sharing this idea @nadja_swiss_parks. We are currently discussing an implementation strategy for both 2D and 3D measurement widgets at this point.