[win32] Adjust wrong size after DPI fix in Shell

This commit addresses an issue with the logic fixing a missing DPI
change event from windows in the Shell#WM_WINDOWPOSCHANGED callback. It
is no longer necessary, because the causing issue is that in some
scenarios a sub shell is positioned on a random monitor. Solution is to
adapt the nativeZoom of the sub Shell after the handle was created.

Author: akoch-yatta

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

@@ -553,6 +553,14 @@ public void close () {
 	closeWidget ();
 }
 
+@Override
+void createWidget() {
+	super.createWidget ();
+	if (parent != null) {
+		this.nativeZoom = DPIUtil.mapDPIToZoom(OS.GetDpiForWindow(handle));
+	}
+}
+
 void createBalloonTipHandle () {
 	balloonTipHandle = OS.CreateWindowEx (
 		0,