Option to measure in a map view

Description of the limitation and why it is relevant to address

As a user I want to be able to make length and area measurements in the MapView and GeoJsonViews

I think this is relevant for the VIKTOR platform because you often have to make measurements to check something or that get a feeling about a distance or area.

Submitter proposed design (optional)

I would add a measurement button to the views. If you click it you get the option to measure the length or an area. Next, you can draw on the map.

As long as the measure widget is open, the drawn line or area should stay visible on the map.

Current workarounds

None