Function getScaledZoomValueForScope

Calculates the ScaledZoom value for a given scopedZoom in a currentScope. scopedZoom is the Z-axis zoom value in currentScope units, already relative to NEUTRAL_SCOPE (higher means more zoomed in). ScaledZoom (the return value) represents the distance in currentScope units that a single logical screen pixel covers on the X/Y drawing plane. This value is determined by the scopedZoom (which reflects the Z-axis viewing depth relative to NEUTRAL_SCOPE) and the currentScope.