Scale ImageBasedFrame on parent:resize after ZoomChanged event

This commit adapts ImageBasedFrame scaling to be triggered when it's
parent recieves a resize event after ZoomChanged event on its wrapped
control.

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 -> {
+			if (isDisposed())
+				return;
 			toWrap.pack(true);
 			setFramedControlLocation();
+			parent.layout();
 		});
 
 		addMouseMoveListener(e -> {