Guard Image Type Icon from Smooth Scaling

Enabling the smooth scaling for icon produce erroneous result. Resulting
in icon losing its transparency.

Author: ShahzaibIbrahim

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

@@ -294,6 +294,10 @@ private static ImageData autoScaleImageData (Device device, final ImageData imag
 	int scaledHeight = Math.round (height * scaleFactor);
 	return switch (autoScaleMethod) {
 	case SMOOTH -> {
+        if (imageData.maskPad == SWT.TRANSPARENCY_MASK) {
+            yield imageData.scaledTo(scaledWidth, scaledHeight);
+        }
+
 		Image original = new Image (device, (ImageDataProvider) zoom -> imageData);
 		/* Create a 24 bit image data with alpha channel */
 		final ImageData resultData = new ImageData (scaledWidth, scaledHeight, 24, new PaletteData (0xFF, 0xFF00, 0xFF0000));