Actipro Charts for UWP 2020.1 build 0355

Adds option to only show the chart label closest to the pointer.

Features

• Added the LabelVisibility.PointerProximitySingle option, which only shows the label closest to the pointer.
• Added new AggregationKind.SignedMaximum and AggregationKind.SignedMinimum which compare against absolute values while retaining the sign of the original value; e.g., -5 is greater than 4.