Use smooth scaling on Windows if monitor-specific UI scaling is active

Do not change the logic for Linux: coming back to 100% monitor stays in
the current mode.

Author: fedejeanne

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

@@ -603,7 +603,9 @@ 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) {
+	boolean isGtk = SWT.getPlatform().equals("gtk");
+	if (!(isGtk && deviceZoom == 100) // in GTK, preserve the current mode when switching to a 100% monitor
+			&& autoScaleMethodSetting == AutoScaleMethod.AUTO) {
 		if (sholdUseSmoothScaling()) {
 			autoScaleMethod = AutoScaleMethod.SMOOTH;
 		} else {