[Win32] Initialize nativeZoom of TrayItem

The Tray implementation uses the default constructor of the Widget
class. When using that constructor, the nativeZoom of the widget is not
initialized. In case of a Tray, contained TrayItems inherit that zoom
and will fail to get an image set because the zoom is zero.
With this change, a TrayItem will initialize its native zoom based on
the zoom of the context device.

Author: HeikoKlare

bundles/org.eclipse.swt/Eclipse SWT/win32/org/eclipse/swt/widgets/TrayItem.java

@@ -79,6 +79,7 @@ public class TrayItem extends Item {
 public TrayItem (Tray parent, int style) {
 	super (parent, style);
 	this.parent = parent;
+	this.nativeZoom = display.getDeviceZoom();
 	parent.createItem (this, parent.getItemCount ());
 	createUpdateWidget (true);
 }