Fix for runWithAutoScaleValue

This commit addresses and issue with DPIUtil#runWithAutoScaleValue. It
only adapted DPIUtil#autoScaleValue temporarily. As DPIUtil#deviceZoom
is directly affected by autoScaleValue, it is important to adjust it
temporarily as well.
fixes eclipse-platform/eclipse.platform.ui#2897

Author: akoch-yatta

bundles/org.eclipse.swt/Eclipse SWT/common/org/eclipse/swt/internal/DPIUtil.java

@@ -671,10 +671,12 @@ private static int getZoomForAutoscaleProperty (int nativeDeviceZoom, String aut
 public static void runWithAutoScaleValue(String autoScaleValue, Runnable runnable) {
 	String initialAutoScaleValue = DPIUtil.autoScaleValue;
 	DPIUtil.autoScaleValue = autoScaleValue;
+	DPIUtil.deviceZoom = getZoomForAutoscaleProperty(nativeDeviceZoom);
 	try {
 		runnable.run();
 	} finally {
 		DPIUtil.autoScaleValue = initialAutoScaleValue;
+		DPIUtil.deviceZoom = getZoomForAutoscaleProperty(nativeDeviceZoom);
 	}
 }