Bug 282276 [ContatcsDemo] ThemeSwitcher should force a relayout
When switching the Theme the workbench should be instructed to relayout itself because computedSizes() might have changed (e.g different font-heights, ..)
examples/org.eclipse.e4.demo.contacts/src/org/eclipse/e4/demo/contacts/handlers/ThemeUtil.java
/*******************************************************************************
 * Copyright (c) 2009 Siemens AG and others.
 * 
 * All rights reserved. This program and the accompanying materials 
 * are made available under the terms of the Eclipse Public License v1.0
 * which accompanies this distribution, and is available at
 * http://www.eclipse.org/legal/epl-v10.html.
 * 
 * Contributors:
 *     Kai Tödter - initial implementation
 ******************************************************************************/
package org.eclipse.e4.demo.contacts.handlers;
import java.io.IOException;
import java.io.InputStreamReader;
import java.net.MalformedURLException;
import java.net.URL;
import org.eclipse.core.runtime.FileLocator;
import org.eclipse.e4.ui.css.core.engine.CSSEngine;
import org.eclipse.e4.workbench.ui.IWorkbench;
import org.eclipse.e4.workbench.ui.internal.Workbench;
import org.eclipse.swt.widgets.Display;
import org.eclipse.swt.widgets.Shell;
public class ThemeUtil {
	public static void switchTheme(IWorkbench workbench, final String css) {