ImageBasedFrame wraps when parent resizes

This commit improves the logic for when to wrap an ImageBasedFrame by
moving away the responsibility of handling ZoomChanged event from SWT
but rather reacting on when the parent is resizing itself.

Author: amartya4256

bundles/org.eclipse.e4.ui.widgets/src/org/eclipse/e4/ui/widgets/ImageBasedFrame.java

@@ -66,9 +66,13 @@ public ImageBasedFrame(Composite parent, Control toWrap, boolean vertical,
 			ImageBasedFrame frame = (ImageBasedFrame) event.widget;
 			frame.setCursor(null);
 		});
-		toWrap.addListener(SWT.ZoomChanged, event -> {
+
+		parent.addListener(SWT.Resize, event -> {
+			if (isDisposed())
+				return;
 			toWrap.pack(true);
 			setFramedControlLocation();
+			parent.layout();
 		});
 
 		addMouseMoveListener(e -> {