Display resizable geo rectangle on a map
This example displays a rectangle object, which can be resized by dragging its outline.
There is a H.map.Group container, which contains resizable H.map.Rect and H.map.Polyline
as rectangle's outline used for resizing. The outline is hidden by default and shown only when mouse position
is over the group object, or is touched on touch device (pointerenter event). In order to listen to
drag event, object's draggable property must be set to true.
In order to have smoother resizing, the object's volatility property should be set to true.