Use fix value for Inset when tree item has both checkbox and image

The inset value defines a gap between text and image on a tree item, but
due to multiple zoom level it was set to convert that value as per zoom
level but with the combination of image and checkbox, it moves the image
too much on the left resulting in cutoff checkbox. It is better to use
fix value for INSET just for this case

Author: ShahzaibIbrahim

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

@@ -440,7 +440,7 @@ RECT getBounds (int index, boolean getText, boolean getImage, boolean fullText,
 		if (getImage && !fullImage) {
 			if (OS.SendMessage (hwnd, OS.TVM_GETIMAGELIST, OS.TVSIL_NORMAL, 0) != 0) {
 				Point size = parent.getImageSize ();
-				rect.left -= size.x + DPIUtil.pointToPixel(Tree.INSET, getZoom());
+				rect.left -= size.x + Tree.INSET;
 				if (!getText) rect.right = rect.left + size.x;
 			} else {
 				if (!getText) rect.right = rect.left;