Allow smooth scaling for 100% monitors in Windows too

Smooth scaling is used if:
- (in Windows) Monitor-specific scaling is active
- (in Linux) if the zoom level of the monitor is not divisible by 100
- (in Mac) never

In Linux, once the mode changes to smooth, it stays in smooth.

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

@@ -603,7 +603,8 @@ public static void setDeviceZoom (int nativeDeviceZoom) {
 
 	DPIUtil.deviceZoom = deviceZoom;
 	System.setProperty("org.eclipse.swt.internal.deviceZoom", Integer.toString(deviceZoom));
-	if (deviceZoom != 100 && autoScaleMethodSetting == AutoScaleMethod.AUTO) {
+	if (autoScaleMethodSetting == AutoScaleMethod.AUTO //
+			&& autoScaleMethod != AutoScaleMethod.SMOOTH) { // once in "smooth" mode, stick to it
 		if (sholdUseSmoothScaling()) {
 			autoScaleMethod = AutoScaleMethod.SMOOTH;
 		} else {