Bug 282900 [CSS] ETabFolder should support setWebbyStyle()
And have field in CSS
bundles/org.eclipse.e4.ui.workbench.renderers.swt/src/org/eclipse/e4/workbench/ui/renderers/swt/StackModelFactory.java
ctf.addListener(SWT.Activate, new Listener() {
			public void handleEvent(Event event) {
				CTabFolder ctf = (CTabFolder) event.widget;
				MStack stack = (MStack) ctf.getData(OWNING_ME);
				MItemPart<?> part = stack.getActiveChild();
				if (part != null)
					activate(part);
			}
		});
		((EObject) me).eAdapters().add(0, new AdapterImpl() {
			@Override
			public void notifyChanged(Notification msg) {
				if (ApplicationPackage.Literals.MPART__ACTIVE_CHILD.equals(msg
						.getFeature())) {
					MStack sm = (MStack) msg.getNotifier();
					MPart<?> selPart = sm.getActiveChild();
					CTabFolder ctf = (CTabFolder) ((MStack) msg.getNotifier())
							.getWidget();
					CTabItem item = findItemForPart(sm, selPart);
					if (item != null) {
						if (ctf.getSelection() != item)
							ctf.setSelection(item);
					}
				}
			}
		});
	}
	private void showTab(MItemPart<?> part) {
		CTabFolder ctf = (CTabFolder) getParentWidget(part);
		Control ctrl = (Control) part.getWidget();