[Win32] Update images of tree columns upon DPI change

When moving a shell with a tree that uses images in any other than the
first column to another monitor, those images will be lost in case the
other monitor has a different zoom such that the UI is rescaled. The
reason is that the DPI change handling for TreeItem does not consider
the other images of the tree item at all.

This change explicitly resets all images of a tree item upon DPI change.

Contributes to
#3075

Author: HeikoKlare

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

@@ -1815,6 +1815,11 @@ String getNameText () {
 @Override
 void handleDPIChange(Event event, float scalingFactor) {
 	super.handleDPIChange(event, scalingFactor);
+	if (images != null) {
+		for (int i = 1; i < images.length; i++) {
+			setImage(i, images[i]);
+		}
+	}
 	if (font != null) {
 		setFont(font);
 	}