MapControl, mouse button up, possibility to control MARGIN

[pauldendulk]

Hi,
I have a suggestion for MapControl interface modification.
I need a possibility to virtually extend the margin that is used to detect left mouse click on a feature in a map.
Is there any reason for „16“ to magic number? Could it be a property (with public setter) which would have default value of 16?

MapControl:
private MouseInfoEventArgs GetMouseInfoEventArgs(Point mousePosition, IEnumerable layers)

var margin = 16 * Viewport.Resolution;

[pauldendulk]

This should be fixed in #129