[win32] Fix initialization of thread dpi awareness

This commit moves the initialization of the thread DPI awareness into the creation method. It was done too late before which resulted in all calls do Display::messageProc being executed with the wrong DPI awarness of the thread dpi awareness differs from the process DPI awareness.

Contributes to eclipse-platform#62 and eclipse-platform#131

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

@@ -583,9 +583,6 @@ public Display () {
  */
 public Display (DeviceData data) {
 	super (data);
-	if (DPIUtil.isAutoScaleOnRuntimeActive()) {
-		setRescalingAtRuntime(true);
-	}
 }
 
 Control _getFocusControl () {
@@ -939,6 +936,9 @@ public void close () {
 protected void create (DeviceData data) {
 	checkSubclass ();
 	checkDisplay (thread = Thread.currentThread (), true);
+	if (DPIUtil.isAutoScaleOnRuntimeActive()) {
+		setRescalingAtRuntime(true);
+	}
 	createDisplay (data);
 	register (this);
 	if (Default == null) Default = this;